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ColorWell · contrast check

White or black text on #ef4444?

Tailwind red-500

Use black text. It gives 5.58:1, which passes AA, not AAA.

White text
3.76:1
passes AA for large text only (18pt+/14pt bold)
Black text
5.58:1
passes AA, not AAA

What the thresholds mean

LevelNeedsWhite textBlack text
AA, normal text4.5:1failpass
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

#ffd4cb #ffb8ae #ff958c #ff6963 #e62d34 #b81521 #8c000f #620000 #3b0000

Paste this into your config

// tailwind.config.js
colors: {
  brand: {
    100: "#ffd4cb",
    200: "#ffb8ae",
    300: "#ff958c",
    400: "#ff6963",
    500: "#e62d34",
    600: "#b81521",
    700: "#8c000f",
    800: "#620000",
    900: "#3b0000",
  },
}

Text colour to pair with the 500 shade (#e62d34): black, at 4.79:1. For #ef4444 itself it is black, at 5.58:1.

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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