OKLCH Studio · color reference

blue-600 in OKLCH

Tailwind v4 blue-600: oklch(0.546 0.245 262.9), HEX #155DFC. WCAG + APCA pairs, Fix deep links, and @theme snippet.

blue-600 is a saturated mid-dark — good for primary buttons and links on light surfaces; often works as background with light text after Fix.

#155DFC · oklch(0.546 0.245 262.9)

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 white5.25:1 · AA · Lc 75
#155DFC on #FFFFFF
Open in Contrast →
White on swatch5.25:1 · AA · Lc 80
#FFFFFF on #155DFC
Open in Contrast →
Black on swatch4.00:1 · Fail · Lc 29
#000000 on #155DFC
Open in Contrast →
Suggested text on swatch5.25:1 · AA · Lc 80
#FFFFFF on #155DFC
Open in Contrast →

Against #121212: On near-black (#121212), Fix nudges this stop to #2F78FF for AA text.

@theme {
  --color-blue-600: oklch(0.546 0.245 262.9);
}

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