ColorWell · contrast check
White or black text on #42b883?
Vue green
Use black text. It gives 8.42:1, which passes AAA (and AA).
White text
2.5:1
fails AA
Black text
8.42:1
passes AAA (and AA)
What the thresholds mean
| Level | Needs | White text | Black text |
|---|---|---|---|
| AA, normal text | 4.5:1 | fail | pass |
| AA, large text (18pt+/14pt bold) | 3:1 | fail | pass |
| AAA, normal text | 7:1 | fail | pass |
If you need the other one to pass
Same hue, moved along the lightness ramp until the ratio clears AA.
- For white text, use
#00784b— 5.54:1
The colour itself
- Hex:
#42b883 - RGB:
66, 184, 131 - Oklch:
70.25% 0.132 160
Shade ramp
#c8ffe2 #a9f1ca #83daad #54bc8b #009963 #00784b #005833 #003a1e #001f0a
Paste this into your config
// tailwind.config.js
colors: {
brand: {
100: "#c8ffe2",
200: "#a9f1ca",
300: "#83daad",
400: "#54bc8b",
500: "#009963",
600: "#00784b",
700: "#005833",
800: "#003a1e",
900: "#001f0a",
},
}Text colour to pair with the 500 shade (#009963): black, at 5.74:1. For #42b883 itself it is black, at 8.42:1.
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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- text on #14b8a6 Tailwind teal-500
- text on #06b6d4 Tailwind cyan-500
- text on #0ea5e9 Tailwind sky-500
- text on #3b82f6 Tailwind blue-500
- text on #6366f1 Tailwind indigo-500