OKLCH Studio · color reference
CSS color red in OKLCH
Named CSS color red: oklch(0.628 0.258 29.2), HEX #FF0000. Contrast pairs (WCAG + APCA) and Fix links.
CSS “red” is a chromatic named color — great for accents. Run Fix before using it as text or as a text background.
#FF0000 · oklch(0.628 0.258 29.2)
Contrast pairs
WCAG 2.1 normal text + APCA Lc. Open a pair in the live Fix tool — informational only, not a legal audit.
- Text on white4.00:1 · Fail · Lc 64
#FF0000 on #FFFFFF
Open in Contrast → - White on swatchnot a suggestion4.00:1 · Fail · Lc 70
#FFFFFF on #FF0000
Demo of a common fail — not a suggestion.
Open in Contrast → - Black on swatch5.25:1 · AA · Lc 40
#000000 on #FF0000
Open in Contrast → - Fix → AA on white5.00:1 · AA · Lc 72
#E10000 on #FFFFFF
Open in Contrast → - Suggested text on swatch4.86:1 · AA · Lc 40
#0D0D0D on #FF0000
Open in Contrast →
Dark surface pairing
Against #121212: red already passes AA on #121212.
Copy code
:root {
--red: oklch(0.628 0.258 29.2);
}Related
Keep exploring
Static reference — the live Fix tool uses the same WCAG math with Undo and share links.
Contrast Fix →OKLCH Studio homeTailwind indexCSS names index