Simple first
Start with the job, not the jargon.
OutMonkey leads with the human task. Technical controls only appear when they actually change the result.
Free · No sign-up · PrivateColour & Accessibility
Make the colour readable.
Check contrast, build palettes and make small colour decisions without guessing.
14 tools available now · full set live
What do you need to do?
Pick the job you recognise.
Colour contrast checker
Check a foreground/background contrast ratio.
Open tool →Live URL contrast scanner
Scan a live webpage for contrast issues.
Open tool →Colour blindness simulator
Preview a colour under common vision deficiencies.
Open tool →Palette & harmony generator
Generate related colours from a starting colour.
Open tool →Palette from image
Pull a small colour palette from an image.
Open tool →Accessible palette audit
Check a set of colours for usable combinations.
Open tool →Nearest passing colour finder
Find a nearby colour that improves contrast.
Open tool →Colour converter
Convert HEX into RGB.
Open tool →Tints / shades / tones
Generate lighter and darker versions.
Open tool →Opacity / alpha calculator
Convert opacity percentages to alpha values.
Open tool →Colour difference checker
Measure a simple distance between two colours.
Open tool →Gradient contrast checker
Check text against both ends of a gradient.
Open tool →Button / link / icon contrast
Check small interface elements against a surface.
Open tool →RGB → CMYK Converter
Convert HEX or RGB colour values into CMYK percentages for print prep.
Open tool →Private by design
Local where practical.
Browser-native tools keep supported files on your device. If a future tool needs a server, we’ll tell you before anything leaves your browser.
Read about file handling →