Tool
What the CMYK to RGB Converter does
CMYK to RGB Converter: converts HEX and RGB from Cyan %, Magenta % and Yellow %. Example: cyan % 84, magenta % 58 and yellow % 0 gives HEX #2663eb.
With Cyan %, Magenta %, Yellow % and Key/Black % entered, the CMYK to RGB Converter works out HEX and RGB. Everything recomputes live, which makes it easy to test a few scenarios in a row.
Picking colours that work together is easier with the maths already done. The CMYK to RGB Converter exists to take that particular chore off your hands.
Your data stays on your machine. Once the page has loaded you could disconnect entirely and it would still work.
Field definitions, the method, and a worked example from the default values are all set out further down the page.
What do the CMYK to RGB Converter fields mean?
The CMYK to RGB Converter uses 4 inputs. It opens with a complete example loaded, which is usually the quickest way to understand what a field means.
| Field | What to enter | Default |
|---|---|---|
| Cyan % | accepts 0 to 100 | 84 |
| Magenta % | accepts 0 to 100 | 58 |
| Yellow % | accepts 0 to 100 | 0 |
| Key/Black % | accepts 0 to 100 | 8 |
How does the CMYK to RGB Converter work?
Each output is derived from the inputs above in a single pass; there is no hidden state carried between runs, so the same inputs always give the same conversion.
Validation runs before the calculation, which is why a mistyped value shows an error rather than a plausible-looking result.
Worked example
These are the values the CMYK to RGB Converter loads by default, and the result it produces from them. The numbers below come straight from the default inputs, so you can verify them against the live tool.
| Cyan % | 84 |
|---|---|
| Magenta % | 58 |
| Yellow % | 0 |
| Key/Black % | 8 |
| HEX | #2663eb |
|---|---|
| RGB | rgb(38, 99, 235) |
How to use it
- Type Cyan % (0 to 100).
- Enter Magenta % (0 to 100).
- Set Yellow % (0 to 100).
- Put Key/Black % (0 to 100).
- The answer follows your cursor, in effect. Change a field and read the new figure.
- Look at HEX and RGB in the output panel.
- To keep the result, either copy the link or print the page. Both preserve what is on screen.
What this tool does not do
- Colours render differently across displays; the values are exact but the appearance is not guaranteed.
- Conversions between colour spaces with different gamuts are approximate at the edges.
- Intermediate steps are rounded only for display; if you need full precision, work from the source figures.
- Garbage in, garbage out: confirm each figure means what you think it does before trusting the result.
Frequently asked questions
Cyan %, Magenta %, Yellow % and Key/Black %. That is the whole form. Defaults are loaded for all of them, so the form is usable immediately, without filling anything in first.
Cyan % accepts 0 to 100. Anything beyond those bounds is flagged rather than approximated.
With the values loaded when the page opens, HEX comes out as #2663eb. Try changing one value. The answer refreshes without a page reload.
Nothing is stored. The page has no back end to send data to, and holds your input only in memory.
It is free with no conditions: no sign-up, and no limit on how often you use it.
It follows the standard definition for this operation, so the result matches what a reference implementation would give.