ColorWell · contrast check
White or black text on #475569?
Tailwind slate-600
Use white text. It gives 7.58:1, which passes AAA (and AA).
White text
7.58:1
passes AAA (and AA)
Black text
2.77:1
fails AA
What the thresholds mean
| Level | Needs | White text | Black text |
|---|---|---|---|
| AA, normal text | 4.5:1 | pass | fail |
| AA, large text (18pt+/14pt bold) | 3:1 | pass | fail |
| AAA, normal text | 7:1 | pass | fail |
If you need the other one to pass
Same hue, moved along the lightness ramp until the ratio clears AA.
- For black text, use
#e9f3ff— 18.73:1
The colour itself
- Hex:
#475569 - RGB:
71, 85, 105 - Oklch:
44.55% 0.037 257
Shade ramp
#e9f3ff #d4dfef #b8c5d8 #97a6bb #728198 #576477 #3e4858 #262e3b #10161f
Paste this into your config
// tailwind.config.js
colors: {
brand: {
100: "#e9f3ff",
200: "#d4dfef",
300: "#b8c5d8",
400: "#97a6bb",
500: "#728198",
600: "#576477",
700: "#3e4858",
800: "#262e3b",
900: "#10161f",
},
}Text colour to pair with the 500 shade (#728198): black, at 5.31:1. For #475569 itself it is white, at 7.58:1.
Your own colours, the same way
Paste any hex and get this page for it live — ratio, verdict, ramp. Export the whole palette to CSS variables, a Tailwind config or Figma tokens when you want it in the project rather than on the screen.
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