#312E81 — Tints, Shades & Color Values

Tailwind CSS indigo-900 · Every value on this page is precomputed — copy what you need.

#312E81 is a dark, moderately saturated blue. In Tailwind CSS this exact color is the utility class indigo-900 (e.g. bg-indigo-900, text-indigo-900). Its nearest CSS named color is darkslateblue (#483d8b). For readable text on a #312E81 background, white text gives the strongest contrast (11.42:1). #312E81 sits in the middle of the lightness range, so it can serve as a primary brand or accent color — use its tints for backgrounds and its shades for text and pressed states.

Color Values

Need these in another format? Use our hex to RGB converter for quick two-way conversion.

#312E81 in Tailwind CSS (indigo-900)

#312E81 ships with Tailwind CSS as indigo-900 — use it as bg-indigo-900, text-indigo-900, or border-indigo-900. It sits at step 900 of the indigo ramp; every other step links to its own page:

• 50
• 100
• 200
• 300
• 400
• 500
• 600
• 700
• 800
• 900
• 950

Browse the full Tailwind palette in the color library, or generate in-between steps with the tint & shade generator.

Tints of #312E81 (Mixed with White)

Each step blends the base color toward white using new = old + (255 − old) × factor. Click a swatch to open it in the generator.

• 10% tint #46438e Copy
• 20% tint #5a589a Copy
• 30% tint #6f6da7 Copy
• 40% tint #8382b3 Copy
• 50% tint #9897c0 Copy
• 60% tint #adabcd Copy
• 70% tint #c1c0d9 Copy
• 80% tint #d6d5e6 Copy
• 90% tint #eaeaf2 Copy

Shades of #312E81 (Mixed with Black)

Each step blends the base color toward black using new = old × (1 − factor).

• 10% shade #2c2974 Copy
• 20% shade #272567 Copy
• 30% shade #22205a Copy
• 40% shade #1d1c4d Copy
• 50% shade #191741 Copy
• 60% shade #141234 Copy
• 70% shade #0f0e27 Copy
• 80% shade #0a091a Copy
• 90% shade #05050d Copy

WCAG Contrast & Accessibility

Contrast ratios for text placed on a #312E81 background. WCAG requires 4.5:1 for normal text (AA), 3:1 for large text (AA), and 7:1 for normal text (AAA).

If neither pure white nor pure black reaches the level you need, pick a lighter tint of #312E81 from the ramps above as the background instead — small lightness moves change contrast quickly. Test any other pair with the free contrast checker.

More blue colors in the library: #475569 (slate-600), #4B5563 (gray-600), #1E3A8A (blue-900), #0369A1 (sky-700), #0284C7 (sky-600), #34495E.

Frequently Asked Questions

• What color is #312E81?

  #312E81 is a dark, moderately saturated blue — rgb(49, 46, 129). Its nearest CSS named color is darkslateblue. In Tailwind CSS it is indigo-900.

• How do I make tints and shades of #312E81?

  Mix #312E81 with white for tints and with black for shades. A 20% tint of #312E81 is #5a589a and a 20% shade is #272567 — the full 10%–90% ramps are precomputed on this page, or open #312E81 in the generator for finer steps.

• What text color is readable on #312E81?

  White text gives the strongest contrast on a #312E81 background at 11.42:1, which passes WCAG AA and AAA for normal text.

• What is the Tailwind CSS class for #312E81?

  indigo-900 — use it as bg-indigo-900, text-indigo-900, or border-indigo-900. The full indigo 50–950 ramp is linked above.

Browse more colors in the color library, or start from any hex code on the HexTints homepage.