OKLCH Studio · color reference

yellow-900 in OKLCH

Tailwind v4 yellow-900: oklch(0.421 0.095 57.7), HEX #733E0A. WCAG + APCA pairs, Fix deep links, and @theme snippet.

yellow-900 is a deep shade — strong for text on light surfaces and dark UI chrome. Pair with lighter stops for surfaces.

#733E0A · oklch(0.421 0.095 57.7)

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 white8.67:1 · AAA · Lc 89
#733E0A on #FFFFFF
Open in Contrast →
White on swatch8.67:1 · AAA · Lc 94
#FFFFFF on #733E0A
Open in Contrast →
Black on swatch2.42:1 · Fail · Lc 15
#000000 on #733E0A
Open in Contrast →
Suggested text on swatch8.67:1 · AAA · Lc 94
#FFFFFF on #733E0A
Open in Contrast →

Against #121212: On near-black (#121212), Fix nudges this stop to #B1774A for AA text.

@theme {
  --color-yellow-900: oklch(0.421 0.095 57.7);
}

Static reference — the live Fix tool uses the same WCAG math with Undo and share links.