#0B1B3A
Closest named color: Rich Black (#0D1B2A). oklch(22.8% 0.064 262.1), rgb(11, 27, 58).
Aa
White text reads best on this color (17.04:1).
About this color
#0B1B3A is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.064 and its hue 262°. 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 17.04:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.04:1 |
Values
| HEX | #0B1B3A |
| RGB | rgb(11, 27, 58) |
| HSL | hsl(220, 68%, 14%) |
| OKLCH | oklch(22.8% 0.064 262.1) |
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 #0B1B3A | 17.04:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #0B1B3A | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #0B1B3A text on white | 17.04:1 | AAA | Lc 103.8 | Preferred for body text |
| #0B1B3A 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E2EAF9
oklch(93.5% 0.022 263.2)
-
Step 200
200
#CADAF6
oklch(88.5% 0.042 261.7)
-
Step 300
300
#A6C1F2
oklch(80.8% 0.076 262.2)
-
Step 400
400
#77A0EC
oklch(70.8% 0.121 262.1)
-
Step 500
500
#5486E6
oklch(63.1% 0.155 262.2)
-
Step 600
600
#396DD4
oklch(55.5% 0.168 262.2)
-
Step 700
700
#2C5BB8
oklch(49.2% 0.156 262.2)
-
Step 800
800
#254B95
oklch(42.8% 0.129 262)
-
Step 900
900
#223F76
oklch(37.6% 0.1 261.9)
-
Step 950
950 (this color)
#0B1B3A
oklch(22.8% 0.064 262.1)
#0B1B3A 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) | #0B1E3B | 0.010 |
| Deuteranopia (no green cones) | #031A39 | 0.011 |
| Tritanopia (no blue cones) | #002227 | 0.051 |
| Achromatopsia (no color) | #1C1C1C | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1B3A
#0B1B3A
oklch(22.8% 0.064 262.1)
- #271A00
#271A00
oklch(22.8% 0.047 83.1)
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 #0B1B3A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.032
- Navy Blue #001146 ΔE 0.042
- Oxford Blue #1B263B ΔE 0.046
- Dark #1B2431 ΔE 0.047
- Jet #212529 ΔE 0.064
- Night Blue #040348 ΔE 0.068
- Dark Indigo #1F0954 ΔE 0.069
- Rich Navy #001219 ΔE 0.074
Use #0B1B3A 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.