Our aim
Every page on ColourPickr should help someone choose, convert or check a colour, or understand how colour works. We would rather publish a few thorough pages than many thin ones.
Tools: standards and testing
The tools use published formulas and data:
- sRGB conversions between HEX, RGB and HSL, as used by CSS;
- the relative luminance and contrast ratio definitions in WCAG 2.2, including the corrected 0.04045 threshold;
- the named colour table in the W3C's CSS Color Module Level 4.
Contrast ratios are shown cut off at two decimal places, never rounded up, because WCAG does not allow rounding up to reach a threshold.
Before release, an automated test suite checks the tools against known values. It checks, for example, that black on white is 21:1, that #767676 on white is 4.54:1 and #777777 is 4.47:1, that conversions round-trip correctly, that all 148 colour names match the specification, and that every input format we document is accepted. We also run each tool in a real browser.
Guides: sources and fact-checking
Guides are written in plain UK English. Calculations in worked examples are produced by the same code as the tools, so the numbers in the text match what the tools show. Claims about standards are checked against the standard itself, and claims about research name the study so readers can look it up. Where evidence is weak or disputed, we say so. We do not publish invented statistics, reviews or testimonials.
Use of AI writing tools
We may use AI writing tools to help draft and edit explanatory text. A person reviews and edits every draft before publication, and checks examples and facts against the sources above. The AI Barn is responsible for everything published on ColourPickr, however it was drafted.
Independence and advertising
ColourPickr is funded by advertising shown through Google AdSense. Advertisers do not influence the tools or what the guides say, and we do not accept payment for recommendations.
Corrections
If you find a mistake, email hello@theaibarn.com with the page address and what looks wrong. If a tool is wrong, we fix it and add a test for the case you reported. If a guide is wrong in a way that changes its meaning, we correct it and add a short note at the end of the page saying what changed and when.