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ColorWell · contrast check

White or black text on #b91c1c?

Tailwind red-700

Use white text. It gives 6.47:1, which passes AA, not AAA.

White text
6.47:1
passes AA, not AAA
Black text
3.25:1
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

#ffd7cb #ffbcaf #ff9b8d #ff7165 #de3c35 #b22723 #871010 #5f0001 #390000

Paste this into your config

// tailwind.config.js
colors: {
  brand: {
    100: "#ffd7cb",
    200: "#ffbcaf",
    300: "#ff9b8d",
    400: "#ff7165",
    500: "#de3c35",
    600: "#b22723",
    700: "#871010",
    800: "#5f0001",
    900: "#390000",
  },
}

Text colour to pair with the 500 shade (#de3c35): black, at 4.8:1. For #b91c1c itself it is white, at 6.47:1.

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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