OKLCH Studio · color reference

gray-900 in OKLCH

Tailwind v4 gray-900: oklch(0.210 0.034 264.7), HEX #101828. WCAG + APCA pairs, Fix deep links, and @theme snippet.

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

#101828 · oklch(0.210 0.034 264.7)

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 white17.75:1 · AAA · Lc 105
#101828 on #FFFFFF
Open in Contrast →
White on swatch17.75:1 · AAA · Lc 107
#FFFFFF on #101828
Open in Contrast →
Black on swatch1.18:1 · Fail · Lc 0
#000000 on #101828
Open in Contrast →
Suggested text on swatch17.75:1 · AAA · Lc 107
#FFFFFF on #101828
Open in Contrast →

Against #121212: On near-black (#121212), Fix nudges this stop to #798398 for AA text.

@theme {
  --color-gray-900: oklch(0.210 0.034 264.7);
}

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