OKLCH Studio · color reference
blue-500 in OKLCH
Tailwind v4 blue-500: oklch(0.623 0.214 259.8), HEX #2B7FFF. WCAG + APCA pairs, Fix deep links, and @theme snippet.
blue-500 is Tailwind’s default brand stop — strong for accents and buttons. Verify text on this swatch with Fix; many 500s fail white-on-color for body text.
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 white3.76:1 · Fail · Lc 65
#2B7FFF on #FFFFFF
Open in Contrast → - White on swatchnot a suggestion3.76:1 · Fail · Lc 70
#FFFFFF on #2B7FFF
Demo of a common fail — not a suggestion.
Open in Contrast → - Black on swatch5.58:1 · AA · Lc 40
#000000 on #2B7FFF
Open in Contrast → - Fix → AA on white5.19:1 · AA · Lc 75
#0865E9 on #FFFFFF
Open in Contrast → - Suggested text on swatch5.17:1 · AA · Lc 39
#0D0D0D on #2B7FFF
Open in Contrast →
Dark surface pairing
Against #121212: This stop already passes AA as text on #121212 (4.98:1).
Copy code
@theme {
--color-blue-500: oklch(0.623 0.214 259.8);
}Related
Convert #2B7FFF
Keep exploring
Static reference — the live Fix tool uses the same WCAG math with Undo and share links.
Contrast Fix →OKLCH Studio homeTailwind indexCSS names index