#0B1B3C
Closest named color: Rich Black (#0D1B2A). oklch(23% 0.067 262.8), rgb(11, 27, 60).
Aa
White text reads best on this color (16.98:1).
About this color
#0B1B3C is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.067 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.035 away. White text reads best on it, at 16.98:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.98:1 |
Values
| HEX | #0B1B3C |
| RGB | rgb(11, 27, 60) |
| HSL | hsl(220, 69%, 14%) |
| OKLCH | oklch(23% 0.067 262.8) |
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 #0B1B3C | 16.98:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #0B1B3C | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #0B1B3C text on white | 16.98:1 | AAA | Lc 103.7 | Preferred for body text |
| #0B1B3C text on black | 1.23:1 | 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
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF7
oklch(88.5% 0.044 262.4)
-
Step 300
300
#A5C1F5
oklch(80.9% 0.08 262.6)
-
Step 400
400
#769FF0
oklch(70.7% 0.128 263.1)
-
Step 500
500
#5385EB
oklch(63.2% 0.163 262.9)
-
Step 600
600
#386CD9
oklch(55.6% 0.177 262.8)
-
Step 700
700
#2A59BC
oklch(49% 0.165 262.8)
-
Step 800
800
#244A98
oklch(42.8% 0.135 262.6)
-
Step 900
900
#223E79
oklch(37.6% 0.106 263.2)
-
Step 950
950 (this color)
#0B1B3C
oklch(23% 0.067 262.8)
#0B1B3C 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) | #091F3D | 0.013 |
| Deuteranopia (no green cones) | #011A3B | 0.013 |
| Tritanopia (no blue cones) | #002328 | 0.055 |
| Achromatopsia (no color) | #1C1C1C | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1B3C
#0B1B3C
oklch(23% 0.067 262.8)
- #281A00
#281A00
oklch(23% 0.047 81.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #0B1B3C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.035
- Navy Blue #001146 ΔE 0.040
- Oxford Blue #1B263B ΔE 0.046
- Dark #1B2431 ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.066
- Night Blue #040348 ΔE 0.066
- Jet #212529 ΔE 0.066
- Dark Navy #000435 ΔE 0.076
Use #0B1B3C 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.