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ColorWell · contrast check

White or black text on #4f46e5?

Tailwind indigo-600

Use white text. It gives 6.29:1, which passes AA, not AAA.

White text
6.29:1
passes AA, not AAA
Black text
3.34:1
passes AA for large text only (18pt+/14pt bold)

What the thresholds mean

LevelNeedsWhite textBlack text
AA, normal text4.5:1passfail
AA, large text (18pt+/14pt bold)3:1passpass
AAA, normal text7:1failfail

If you need the other one to pass

Same hue, moved along the lightness ramp until the ratio clears AA.

The colour itself

Shade ramp

#dceaff #c4d3ff #a8b5ff #8790ff #6562ff #4d48d8 #372fa7 #221679 #10004d

Paste this into your config

// tailwind.config.js
colors: {
  brand: {
    100: "#dceaff",
    200: "#c4d3ff",
    300: "#a8b5ff",
    400: "#8790ff",
    500: "#6562ff",
    600: "#4d48d8",
    700: "#372fa7",
    800: "#221679",
    900: "#10004d",
  },
}

Text colour to pair with the 500 shade (#6562ff): black, at 4.74:1. For #4f46e5 itself it is white, at 6.29:1.

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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