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ColorWell · contrast check

White or black text on #ff0000?

YouTube red

Use black text. It gives 5.25:1, which passes AA, not AAA.

White text
4:1
passes AA for large text only (18pt+/14pt bold)
Black text
5.25:1
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

#ffccba #ffae99 #ff8671 #ff5240 #f90000 #c80000 #990000 #6c0000 #420000

Paste this into your config

// tailwind.config.js
colors: {
  brand: {
    100: "#ffccba",
    200: "#ffae99",
    300: "#ff8671",
    400: "#ff5240",
    500: "#f90000",
    600: "#c80000",
    700: "#990000",
    800: "#6c0000",
    900: "#420000",
  },
}

Text colour to pair with the 500 shade (#f90000): black, at 5.03:1. For #ff0000 itself it is black, at 5.25:1.

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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