#0C1B37
Closest named color: Rich Black (#0D1B2A). oklch(22.7% 0.058 261.7), rgb(12, 27, 55).
Aa
White text reads best on this color (17.10:1).
About this color
#0C1B37 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.058 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.026 away. White text reads best on it, at 17.10:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.058) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.10:1 |
Values
| HEX | #0C1B37 |
| RGB | rgb(12, 27, 55) |
| HSL | hsl(219, 64%, 13%) |
| OKLCH | oklch(22.7% 0.058 261.7) |
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 #0C1B37 | 17.10:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #0C1B37 | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #0C1B37 text on white | 17.10:1 | AAA | Lc 103.9 | Preferred for body text |
| #0C1B37 text on black | 1.22:1 | 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
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CBDAF3
oklch(88.5% 0.038 260.7)
-
Step 300
300
#A8C2EE
oklch(81% 0.069 260.9)
-
Step 400
400
#7AA0E6
oklch(70.6% 0.111 262.1)
-
Step 500
500
#5887DE
oklch(63% 0.141 261.7)
-
Step 600
600
#3E6FCC
oklch(55.6% 0.154 261.8)
-
Step 700
700
#305CB0
oklch(49% 0.143 261.8)
-
Step 800
800
#284C8F
oklch(42.7% 0.119 261.5)
-
Step 900
900
#254072
oklch(37.7% 0.092 261.6)
-
Step 950
950 (this color)
#0C1B37
oklch(22.7% 0.058 261.7)
#0C1B37 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) | #0E1E38 | 0.011 |
| Deuteranopia (no green cones) | #071A36 | 0.008 |
| Tritanopia (no blue cones) | #002126 | 0.046 |
| Achromatopsia (no color) | #1C1C1C | 0.058 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C1B37
#0C1B37
oklch(22.7% 0.058 261.7)
- #271900
#271900
oklch(22.6% 0.047 80.5)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #0C1B37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.026
- Dark #1B2431 ΔE 0.044
- Oxford Blue #1B263B ΔE 0.046
- Navy Blue #001146 ΔE 0.047
- Jet #212529 ΔE 0.061
- Rich Navy #001219 ΔE 0.070
- Night Blue #040348 ΔE 0.072
- Dark Indigo #1F0954 ΔE 0.074
Use #0C1B37 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.