ColorWell · contrast check
White or black text on #15803d?
Tailwind green-700
Use white text. It gives 5.02:1, which passes AA, not AAA.
White text
5.02:1
passes AA, not AAA
Black text
4.19:1
passes AA for large text only (18pt+/14pt bold)
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 | pass |
| AAA, normal text | 7:1 | fail | 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
#cfffd8— 18.95:1
The colour itself
- Hex:
#15803d - RGB:
21, 128, 61 - Oklch:
52.73% 0.137 150
Shade ramp
#cfffd8 #b2f0be #8fd89e #64bb79 #2d974f #187639 #015725 #003a11 #001e02
Paste this into your config
// tailwind.config.js
colors: {
brand: {
100: "#cfffd8",
200: "#b2f0be",
300: "#8fd89e",
400: "#64bb79",
500: "#2d974f",
600: "#187639",
700: "#015725",
800: "#003a11",
900: "#001e02",
},
}Text colour to pair with the 500 shade (#2d974f): black, at 5.65:1. For #15803d itself it is white, at 5.02:1.
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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