ColorWell · contrast check
White or black text on #3178c6?
TypeScript blue
Use black text. It gives 4.63:1, which passes AA, not AAA.
White text
4.53:1
passes AA, not AAA
Black text
4.63:1
passes AA, not AAA
What the thresholds mean
| Level | Needs | White text | Black text |
|---|---|---|---|
| AA, normal text | 4.5:1 | pass | pass |
| AA, large text (18pt+/14pt bold) | 3:1 | pass | pass |
| AAA, normal text | 7:1 | fail | fail |
The colour itself
- Hex:
#3178c6 - RGB:
49, 120, 198 - Oklch:
56.71% 0.14 253
Shade ramp
#cef6ff #b2e2ff #90c8ff #67a8f3 #3682d5 #2364aa #104882 #002d5b #001537
Paste this into your config
// tailwind.config.js
colors: {
brand: {
100: "#cef6ff",
200: "#b2e2ff",
300: "#90c8ff",
400: "#67a8f3",
500: "#3682d5",
600: "#2364aa",
700: "#104882",
800: "#002d5b",
900: "#001537",
},
}Text colour to pair with the 500 shade (#3682d5): black, at 5.31:1. For #3178c6 itself it is black, at 4.63:1.
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.
Open ColorWellOther colours
- text on #ef4444 Tailwind red-500
- text on #f97316 Tailwind orange-500
- text on #f59e0b Tailwind amber-500
- text on #eab308 Tailwind yellow-500
- text on #84cc16 Tailwind lime-500
- text on #22c55e Tailwind green-500
- text on #10b981 Tailwind emerald-500
- 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