#0F172A — Tints, Shades & Color Values

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

#0F172A is a very dark, moderately saturated blue. In Tailwind CSS this exact color is the utility class slate-900 (e.g. bg-slate-900, text-slate-900). Its nearest CSS named color is black (#000000). For readable text on a #0F172A background, white text gives the strongest contrast (17.85:1). Because it is dark, #0F172A suits text, navigation bars, and footers on light backgrounds, and its tints make natural hover and surface colors.

Color Values

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

#0F172A in Tailwind CSS (slate-900)

#0F172A ships with Tailwind CSS as slate-900 — use it as bg-slate-900, text-slate-900, or border-slate-900. It sits at step 900 of the slate 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 #0F172A (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 #272e3f Copy
• 20% tint #3f4555 Copy
• 30% tint #575d6a Copy
• 40% tint #6f747f Copy
• 50% tint #878b95 Copy
• 60% tint #9fa2aa Copy
• 70% tint #b7b9bf Copy
• 80% tint #cfd1d4 Copy
• 90% tint #e7e8ea Copy

Shades of #0F172A (Mixed with Black)

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

• 10% shade #0e1526 Copy
• 20% shade #0c1222 Copy
• 30% shade #0b101d Copy
• 40% shade #090e19 Copy
• 50% shade #080c15 Copy
• 60% shade #060911 Copy
• 70% shade #05070d Copy
• 80% shade #030508 Copy
• 90% shade #010204 Copy

WCAG Contrast & Accessibility

Contrast ratios for text placed on a #0F172A 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 #0F172A 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: #111827 (gray-900), #082F49 (sky-950), #1F2937 (gray-800), #030712 (gray-950), #09090B (zinc-950), #1E1B4B (indigo-950).

Frequently Asked Questions

• What color is #0F172A?

  #0F172A is a very dark, moderately saturated blue — rgb(15, 23, 42). Its nearest CSS named color is black. In Tailwind CSS it is slate-900.

• How do I make tints and shades of #0F172A?

  Mix #0F172A with white for tints and with black for shades. A 20% tint of #0F172A is #3f4555 and a 20% shade is #0c1222 — the full 10%–90% ramps are precomputed on this page, or open #0F172A in the generator for finer steps.

• What text color is readable on #0F172A?

  White text gives the strongest contrast on a #0F172A background at 17.85:1, which passes WCAG AA and AAA for normal text.

• What is the Tailwind CSS class for #0F172A?

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

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