#0B1F3A
Closest named color: Rich Black (#0D1B2A). oklch(23.9% 0.058 256.7), rgb(11, 31, 58).
Aa
White text reads best on this color (16.51:1).
About this color
#0B1F3A is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.058 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.032 away. White text reads best on it, at 16.51:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.51:1 |
Values
| HEX | #0B1F3A |
| RGB | rgb(11, 31, 58) |
| HSL | hsl(214, 68%, 14%) |
| OKLCH | oklch(23.9% 0.058 256.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #0B1F3A | 16.51:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #0B1F3A | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #0B1F3A text on white | 16.51:1 | AAA | Lc 103.3 | Preferred for body text |
| #0B1F3A text on black | 1.27:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#C9DBF3
oklch(88.5% 0.038 255.6)
-
Step 300
300
#A4C3ED
oklch(80.9% 0.069 256.1)
-
Step 400
400
#73A3E5
oklch(70.8% 0.11 256.5)
-
Step 500
500
#4D8ADD
oklch(63.1% 0.141 256.6)
-
Step 600
600
#2F72CB
oklch(55.6% 0.154 256.8)
-
Step 700
700
#215FAF
oklch(49.1% 0.142 256.6)
-
Step 800
800
#1E4E8E
oklch(42.7% 0.118 256.8)
-
Step 900
900
#1E4171
oklch(37.6% 0.092 256.9)
-
Step 950
950 (this color)
#0B1F3A
oklch(23.9% 0.058 256.7)
#0B1F3A with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #12213B | 0.012 |
| Deuteranopia (no green cones) | #0B1D39 | 0.007 |
| Tritanopia (no blue cones) | #002529 | 0.046 |
| Achromatopsia (no color) | #1F1F1F | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1F3A
#0B1F3A
oklch(23.9% 0.058 256.7)
- #2C1B00
#2C1B00
oklch(23.8% 0.05 76.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #0B1F3A
These curated palettes and gradients contain exactly #0B1F3A. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Oxford Blue #1B263B ΔE 0.034
- Dark #1B2431 ΔE 0.036
- Navy Blue #001146 ΔE 0.053
- Jet #212529 ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.071
- Dark Indigo #1F0954 ΔE 0.077
- Marine #042E60 ΔE 0.079
Use #0B1F3A in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.