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ColorWell · contrast check

White or black text on #0ea5e9?

Tailwind sky-500

Use black text. It gives 7.58:1, which passes AAA (and AA).

White text
2.77:1
fails AA
Black text
7.58:1
passes AAA (and AA)

What the thresholds mean

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

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

#befbff #9de8ff #73cfff #3bb0ef #008ad0 #006ba7 #004e7f #003259 #001835

Paste this into your config

// tailwind.config.js
colors: {
  brand: {
    100: "#befbff",
    200: "#9de8ff",
    300: "#73cfff",
    400: "#3bb0ef",
    500: "#008ad0",
    600: "#006ba7",
    700: "#004e7f",
    800: "#003259",
    900: "#001835",
  },
}

Text colour to pair with the 500 shade (#008ad0): black, at 5.55:1. For #0ea5e9 itself it is black, at 7.58:1.

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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