Convert HEX to CMYK Hexadecimal ↔ Cyan Magenta Yellow Black Free Online Secure
Type a value in HEX and read it in CMYK at once. The arithmetic happens in your browser, nothing is sent anywhere, and what the conversion depends on is written out below rather than assumed.
Nothing uploaded
Where these notations come from
Hex and RGB are the same thing written twice. A screen colour is three numbers — how much red, green and blue light to emit — each from 0 to 255, which is one byte; hex simply writes those bytes in base sixteen, so #FF8800 and rgb(255, 136, 0) are the same instruction to the same pixel. HSL was invented because neither is readable by a human: it gives hue as an angle around a colour wheel, with saturation and lightness as percentages, so a designer can make something lighter without recomputing three figures. CMYK belongs to a different world altogether — ink rather than light. It is subtractive, built from four printing plates, and it cannot reach every colour a screen can, because a screen emits light while paper only reflects it.
Where you meet them
Hex is what you type into a stylesheet and what a design tool hands you. RGB appears wherever a colour needs arithmetic — gradients, transparency, code that computes a shade. HSL is what you reach for when adjusting a palette by hand, because the changes you want are usually changes of one of its three numbers. CMYK is what a printer asks for, and converting into it is the moment a design stops being light and becomes ink.
Questions people ask
Why does my CMYK result differ from what my printer gives me?
Because there is no single correct conversion. The arithmetic on this page is the simple, device-independent one, which is the right answer when you need a starting point or a rough equivalent. A print shop converts through a colour profile that accounts for the specific ink, paper and press, and the same RGB colour will produce different CMYK values on glossy stock than on uncoated. For anything that must match, ask the printer for their profile rather than trusting a formula.
Why can't some screen colours be printed?
Because the two cannot reach the same colours. A screen makes colour by adding light and can produce a vivid, saturated cyan or green that ink simply cannot match; paper makes colour by absorbing light, and the brightest it can ever be is the white of the page. The set of colours each can reach is called its gamut, and where they do not overlap, a conversion has to choose the nearest available colour. That is why a bright screen colour often looks slightly dulled in print.
Is the answer exact?
Where both units are defined in terms of one another by whole numbers, yes — the page says so above the figure, and the only rounding is in how many digits are shown. Where the ratio has no finite decimal, the page shows twelve significant digits and says the relation is approximate rather than pretending otherwise.
Does anything I type leave my device?
No. The arithmetic runs in your browser; nothing is uploaded and there is no server to upload it to. Load the page once and it keeps working with the network switched off.
Why you convert HEX to CMYK
You have spent weeks on a brand identity, and its colours live in hex: #D66238 for the accent, #1E7A5C for the primary, #2B2B2B for text. Now someone wants business cards, a banner, packaging or a printed report, and the print shop's form asks for CMYK. The colours that were so clear on screen have to be translated into the four inks of a press. To convert HEX to CMYK is the first step of that translation: it takes the code a browser understands and gives you the four percentages that a printer's plates work with.
Be clear about what to expect. The conversion has two steps, and both are performed here: from the hex code to the red, green and blue light it describes, which is exact, and from there to cyan, magenta, yellow and black, which is a standard formula with real limits. Ink on paper and light on a screen are different things, and converting faithfully between them needs the profile of the press, of the paper and of your monitor. Without those, the result is a good starting point for a conversation with the printer, not a guarantee of how the print will look. The page says so, and the sections below explain how to make good use of it.
The calculation happens in your browser, and nothing is uploaded. Below you will find how the two steps work, with an example, what the conversion keeps and what it cannot, how to brief a print shop with the numbers, the reasons screen colours change on paper, and a few habits that save money and reprints.
How the conversion works
Step one: from the code to three numbers
A hex code is three pairs of base-sixteen digits, one for each light. #D66238 splits into D6, 62 and 38, which are 214, 98 and 56. This step is exact: the code and the numbers are two spellings of the same colour.
Step two: from light to ink
Ink works by taking light away, so the formula turns the three light values into the amounts of ink needed. First the black: K = 1 − the largest of R, G and B as a fraction of 255. Here the largest is red at 214, which is 0.839, so K = 0.161, about 16%. The other three are then worked out from what is left: cyan is (1 − 0.839 − 0.161) ÷ 0.839 = 0%, magenta is (1 − 0.384 − 0.161) ÷ 0.839 = 54%, and yellow is (1 − 0.220 − 0.161) ÷ 0.839 = 74%. The result is cmyk(0%, 54%, 74%, 16%).
Why black comes first
Printers add black because cyan, magenta and yellow together make a muddy brown and use a lot of ink. Taking the black from the darkest channel is how ink actually saves ink: wherever the colour is dark, the cheap, sharp black plate does the work in place of three coloured inks.
What the conversion keeps and what it cannot
It keeps the colour as close as a formula can
The result is the colour as close as a formula can put it, and the four plates in the order a printer expects them: cyan, magenta, yellow and the black that carries the shadows.
The honest limit: there is no single correct answer
This is the honest limit of the whole page. Ink on paper and light on a screen are different things, and converting faithfully between them needs the profile of the press, of the paper and of your monitor. Without those, what you get is the standard formula every web tool uses: good enough to pick a colour on screen, not good enough to send to a printer. Treat the numbers as a starting point and let the print shop set the final values.
Two more things the formula cannot carry
A rich black mixed from several inks comes back as plain K. And a spot colour has no CMYK equivalent at all. If your brand colour is a Pantone ink, the CMYK is an imitation, and you should ask the printer whether to print it as a spot ink instead.
Whole percents
Because the four numbers are written as whole percents, a colour taken across and back can land one step away. Our example comes back as #D66338, one step from #D66238: invisible, but proof that the round trip is not exact. Keep the hex as the master.
Why screen colours change on paper
Gamut
A screen can show some colours that no press can reproduce, particularly bright, saturated blues, greens and oranges. When you convert HEX to CMYK, such a colour is moved to the nearest one the inks can make, which is duller. A neon green on a monitor becomes a calmer green on paper. That is not a fault of the conversion but a property of the inks.
Paper
Coated paper keeps colours bright and sharp. Uncoated paper soaks up ink and makes the same numbers look softer and darker. Recycled and textured stocks are more extreme still. The same CMYK values look different on each, which is why the printer's profile matters.
Light
A screen shines; paper reflects the light that falls on it. The same page looks different in daylight, under an office tube and in a warm room. Print professionals judge colour under standard lighting for exactly this reason.
Ink limits
Each press can lay down only so much ink in one place before the paper gets too wet. A dark, saturated colour can ask for a lot. A good profile keeps the total within the limit, and a naive conversion does not, which is another reason to let the printer's software do the final conversion.
Briefing a print shop
What to send
Send the hex code, the CMYK from this page as a starting point, a description in words, and, if you have one, a printed sample or a screenshot of the intended colour. The more the operator knows, the closer the first proof will be.
Ask for the profile and a proof
Most shops publish an ICC profile for their presses and papers. If they do, convert with it in your layout program and send the result. In any case, ask for a proof printed on the real stock, and look at it in daylight before approving the run.
Decide on spot or process
If one colour must be exactly right, such as the main brand colour on packaging, ask whether to print it as a spot ink. It costs more because it needs its own plate, but the match is better than four-colour mixing can offer.
Think about small text and thin lines
Fine text should be set in solid black on the black plate alone. A colour built from four inks in small type blurs because the plates never line up perfectly. Pure K for small black text is the safe rule.
How to convert HEX to CMYK here
Type or paste the hex code
Enter the colour in the first field, with or without the hash sign. Three and six digit forms are accepted.
Read the four percentages
The answer appears at once, as in #D66238 = cmyk(0%, 54%, 74%, 16%). The numbers are cyan, magenta, yellow and black, in whole percents.
Take them to the printer as a starting point
Copy the numbers into the brief or the layout program. Do not treat them as final. A proof will tell you whether to adjust.
Where these notations come from
Hex and RGB are the same thing written twice
A screen colour is three numbers, how much red, green and blue light to emit, each from 0 to 255, which is one byte. Hex simply writes those bytes in base sixteen, so #D66238 and rgb(214, 98, 56) are the same instruction to the same pixel. To see the numbers, convert HEX to RGB.
HSL and CMYK
HSL was invented because neither is readable by a human: it gives hue as an angle around a colour wheel, with saturation and lightness as percentages, so a designer can make something lighter without recomputing three figures. CMYK belongs to a different world altogether, ink rather than light. It is subtractive, built from four printing plates, and it cannot reach every colour a screen can, because a screen emits light while paper only reflects it.
Traps when you convert HEX to CMYK
Approving colour from the monitor
The monitor cannot show what the press will print. Do not sign off a run on the strength of the screen.
Converting more than once
Each conversion between the two systems adds error. Convert once from the original hex and keep the result.
Sending web-converted numbers as final
The formula is for orientation. For the file you send, let the layout program convert with the printer's profile.
Forgetting how the brand will look next to old print
If the company has printed material from earlier years, hold the new proof next to it. Colours that differ slightly are noticed at once when they sit side by side.
Questions people ask before converting
What is #FFFFFF in CMYK?
cmyk(0%, 0%, 0%, 0%), no ink at all: the white of the paper.
What is #000000 in CMYK?
cmyk(0%, 0%, 0%, 100%), black ink alone.
Why is there no single right answer?
Because the printed colour depends on the press, the paper and the light, and a formula knows none of them.
Will my web colour print exactly?
Rarely. Bright saturated colours especially are duller in print.
Is my colour uploaded?
No. The arithmetic runs in your browser and nothing is sent anywhere.
How do I go back?
With CMYK to HEX, which turns the four percentages back into a code.
Habits that save money and reprints
Order a proof for every new brand colour
A proof costs little compared with a reprint of thousands of copies. Make it a rule that no new colour goes to press without one.
Keep the approved values
When a proof is approved, record the final CMYK, the press and the paper in the brand sheet. The next job on the same stock can reuse the numbers, and the colour will match.
Choose colours with print in mind
If you can, pick brand colours that live in both gamuts. Moderately saturated tones convert gracefully; neon tones do not. A colour that looks good on both screen and paper is worth more than one that looks spectacular only on the monitor.
Test on the worst paper
If the brand will appear on cheap uncoated stock as well as on glossy cards, check the proof on the cheap one. If the colour survives there, it will survive anywhere.
Good practice when you convert HEX to CMYK
Convert HEX to CMYK once, at the end of the design
While a design lives on screen, keep it in hex or RGB. Convert HEX to CMYK when the artwork is ready to go to the printer, and do it once. Converting early and then editing carries dull colours into every later version, and converting twice adds error each time.
Convert HEX to CMYK for every colour in the file
A design contains more colours than the brand palette: tints, shadows, borders, the grey of a caption. If you convert HEX to CMYK only for the main colours and leave the rest to chance, some parts of the print will look different from the rest. Go through the file and make sure every colour is accounted for.
Beware of gradients and photographs
Gradients that run between bright screen colours may show visible steps or dull patches when converted. Photographs convert best through the layout program with a profile, and not colour by colour. Treat this page as the tool for flat brand colours, and use software conversion for images.
Think about the finish
Gloss, matt and soft-touch laminates change the look of the printed colour, glossy lamination making it richer and matt slightly flatter. If the job is laminated, ask the printer to proof with the finish, and decide on the final values after seeing it.
Keep a master file
Store the original artwork in RGB or hex, with a separate print version in CMYK. If the brand is reprinted years later on a different press, you can start from the master and convert HEX to CMYK again with the new press's profile.
Related converters
The same family of tools covers the neighbouring conversions. To go back, use CMYK to HEX. For the RGB numbers directly, there are RGB to CMYK and CMYK to RGB, and for the screen notations themselves, HEX to RGB, RGB to HEX and HEX to HSL. For files that travel to the printer, compress PDF reduces their size and PDF to PNG makes previews.
A worked example
Say your accent colour is #D66238 and the print shop asks for CMYK for a set of business cards. You type the code and read cmyk(0%, 54%, 74%, 16%). You send the shop the hex, those four numbers as a starting point and a note that the orange should be warm and slightly muted, not neon. They proof it on uncoated stock, the orange comes out a touch darker than the screen, and you agree on cmyk(0%, 52%, 78%, 12%). That set goes into the brand sheet as the print master for uncoated stock, with the hex remaining the master for the web.
A short checklist
Before converting
Know the paper and the press. Decide whether the colour is process or spot. Ask for the printer's profile.
While converting
Paste the hex, read the four percentages and note them as a starting point.
After converting
Order a proof, look at it in daylight and adjust the CMYK values rather than the screen colour.
Common mistakes
Treating the formula as final
It is for orientation. The proof decides.
Forgetting the black rule for small text
Fine black text belongs on the black plate alone.
Approving by monitor
Only a proof shows the real result.
Your colours stay on your device
The calculation happens locally. Your values are used by your own browser and nothing is sent anywhere. There is nothing to delete afterwards and no account to create. That is the plain way to convert HEX to CMYK.
Summary
To convert HEX to CMYK here, type or paste the hex code and read the four percentages at once. The conversion takes two steps: from the code to the red, green and blue light it describes, which is exact, and from there to ink by a standard formula. The result is the colour as close as a formula can put it, and the four plates in the order a printer expects them. There is no single correct answer, because ink on paper and light on a screen are different things, and converting faithfully needs the profile of the press, of the paper and of your monitor. Treat the numbers as a starting point and let the print shop set the final values. A rich black comes back as plain K, and a spot colour has no CMYK equivalent. Nothing is uploaded.