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blue-900

#1c398e

Tailwind CSS v4.3.3 blue-900 is oklch(37.9% 0.146 265.522) in OKLCH, the format Tailwind uses, and #1c398e in HEX.

Class
OKLCH
HEX
RGB
HSL
CSS
Open #1c398e in the pickerCheck contrast

Classes

Click to copy. Add /50 for 50% opacity, for example bg-blue-900/50.

Text on blue-900

  • Aawhite10.4:1Readable · AA
  • Aablack2.02:1Hard to read
  • Aablue-509.54:1Readable · AA

Most readable text from the blue scale: blue-50

Tailwind blue scale

  1. 50
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  10. 900
  11. 950

Step 900 in other Tailwind colors

Questions and answers

What is the hex code of Tailwind blue-900?

blue-900 is #1c398e in HEX, rgb(28 57 142) in RGB and oklch(37.9% 0.146 265.522) in OKLCH. Tailwind CSS v4.3.3 defines its colors in OKLCH, so the HEX value is the closest sRGB match.

Is Tailwind blue-900 accessible for text?

White text on blue-900 has a contrast ratio of 10.4:1 and black text 2.02:1. WCAG AA needs 4.5:1 for normal text and 3:1 for large text, so white text is the better choice here.

How do I use blue-900 in Tailwind CSS?

Add bg-blue-900, text-blue-900 or border-blue-900 to an element. In your own CSS use var(--color-blue-900), the CSS variable Tailwind v4 creates for every color.