Color Converter
Type a colour as #hex, rgb() or hsl() and the other formats appear instantly with a swatch. Contrast ratios against white and black show whether the colour passes WCAG AA (4.5:1) or AAA (7:1) for text.
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Formulas
HSL conversion uses the CSS Color 4 algorithm. Contrast ratio = (L1 + 0.05) / (L2 + 0.05) using WCAG 2.x relative luminance.
Privacy
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Common questions
Are named colours like “teal” supported?
Not yet; use hex, rgb or hsl.
Is the alpha channel included?
Yes, as 8-digit hex, rgba() and hsla(). Contrast ignores alpha.
Methodology reviewed 2026-10-27. Processing details and test approach.