OKLCH Studio · color reference

emerald-900 in OKLCH

Tailwind v4 emerald-900: oklch(0.378 0.077 168.9), HEX #004F3B. WCAG + APCA pairs, Fix deep links, and @theme snippet.

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

#004F3B · oklch(0.378 0.077 168.9)

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 white9.63:1 · AAA · Lc 92
#004F3B on #FFFFFF
Open in Contrast →
White on swatch9.63:1 · AAA · Lc 96
#FFFFFF on #004F3B
Open in Contrast →
Black on swatch2.18:1 · Fail · Lc 12
#000000 on #004F3B
Open in Contrast →
Suggested text on swatch9.63:1 · AAA · Lc 96
#FFFFFF on #004F3B
Open in Contrast →

Against #121212: On near-black (#121212), Fix nudges this stop to #478972 for AA text.

@theme {
  --color-emerald-900: oklch(0.378 0.077 168.9);
}

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