OKLCH Studio · color reference

blue-400 in OKLCH

Tailwind v4 blue-400: oklch(0.707 0.165 254.6), HEX #51A2FF. WCAG + APCA pairs, Fix deep links, and @theme snippet.

blue-400 sits in the mid-light range — useful for secondary surfaces and large display type after a contrast check.

#51A2FF · oklch(0.707 0.165 254.6)

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 white2.64:1 · Fail · Lc 51
#51A2FF on #FFFFFF
Open in Contrast →
White on swatchnot a suggestion2.64:1 · Fail · Lc 56
#FFFFFF on #51A2FF
Demo of a common fail — not a suggestion.
Open in Contrast →
Black on swatch7.96:1 · AAA · Lc 53
#000000 on #51A2FF
Open in Contrast →
Fix → AA on white4.96:1 · AA · Lc 74
#1870CD on #FFFFFF
Open in Contrast →
Suggested text on swatch7.37:1 · AAA · Lc 53
#0D0D0D on #51A2FF
Open in Contrast →

Against #121212: This stop already passes AA as text on #121212 (7.10:1).

@theme {
  --color-blue-400: oklch(0.707 0.165 254.6);
}

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