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ColorWell · contrast check

White or black text on #a855f7?

Tailwind purple-500

Use black text. It gives 5.31:1, which passes AA, not AAA.

White text
3.96:1
passes AA for large text only (18pt+/14pt bold)
Black text
5.31:1
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

#ffddff #f5c3ff #dea2ff #c37aff #a147f3 #7f30c4 #5f1996 #40006b #240043

Paste this into your config

// tailwind.config.js
colors: {
  brand: {
    100: "#ffddff",
    200: "#f5c3ff",
    300: "#dea2ff",
    400: "#c37aff",
    500: "#a147f3",
    600: "#7f30c4",
    700: "#5f1996",
    800: "#40006b",
    900: "#240043",
  },
}

Text colour to pair with the 500 shade (#a147f3): black, at 4.71:1. For #a855f7 itself it is black, at 5.31:1.

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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