#0C102C
Closest named color: Rich Black (#0D1B2A). oklch(18.8% 0.056 273.6), rgb(12, 16, 44).
Aa
White text reads best on this color (18.64:1).
About this color
#0C102C is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.056 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.040 away. White text reads best on it, at 18.64:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.12:1 |
| White text | 18.64:1 |
Values
| HEX | #0C102C |
| RGB | rgb(12, 16, 44) |
| HSL | hsl(233, 57%, 11%) |
| OKLCH | oklch(18.8% 0.056 273.6) |
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 #0C102C | 18.64:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #0C102C | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #0C102C text on white | 18.64:1 | AAA | Lc 105.1 | Preferred for body text |
| #0C102C text on black | 1.12:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B2BEEC
oklch(80.8% 0.066 273.4)
-
Step 400
400
#8B9CE3
oklch(70.8% 0.106 273.1)
-
Step 500
500
#7081DB
oklch(63% 0.136 273.8)
-
Step 600
600
#5969C9
oklch(55.6% 0.149 273.5)
-
Step 700
700
#4957AD
oklch(49.1% 0.137 273.4)
-
Step 800
800
#3C478C
oklch(42.6% 0.114 273.8)
-
Step 900
900
#333D70
oklch(37.8% 0.088 273.2)
-
Step 950
950 (this color)
#0C102C
oklch(18.8% 0.056 273.6)
#0C102C 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) | #03142D | 0.017 |
| Deuteranopia (no green cones) | #00112B | 0.020 |
| Tritanopia (no blue cones) | #00161B | 0.049 |
| Achromatopsia (no color) | #131313 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C102C
#0C102C
oklch(18.8% 0.056 273.6)
- #191300
#191300
oklch(18.9% 0.039 94.7)
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 #0C102C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.040
- Rich Navy #001219 ΔE 0.048
- Dark Navy #000435 ΔE 0.050
- Navy Blue #001146 ΔE 0.053
- Midnight #03012D ΔE 0.056
- Dark Navy Blue #00022E ΔE 0.057
- Very Dark Blue #000133 ΔE 0.059
- Night Blue #040348 ΔE 0.064
Use #0C102C 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.