#0C1830
Closest named color: Rich Black (#0D1B2A). oklch(21.3% 0.051 262.8), rgb(12, 24, 48).
Aa
White text reads best on this color (17.66:1).
About this color
#0C1830 is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.051 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 17.66:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.66:1 |
Values
| HEX | #0C1830 |
| RGB | rgb(12, 24, 48) |
| HSL | hsl(220, 60%, 12%) |
| OKLCH | oklch(21.3% 0.051 262.8) |
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 #0C1830 | 17.66:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #0C1830 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #0C1830 text on white | 17.66:1 | AAA | Lc 104.4 | Preferred for body text |
| #0C1830 text on black | 1.18:1 | 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
#F3F6FB
oklch(97.2% 0.007 260.7)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ACC1E8
oklch(80.8% 0.06 262.8)
-
Step 400
400
#81A0DD
oklch(70.6% 0.096 263.4)
-
Step 500
500
#6188D3
oklch(63.1% 0.122 262.6)
-
Step 600
600
#4870C1
oklch(55.6% 0.134 263)
-
Step 700
700
#3A5EA6
oklch(49.2% 0.123 262.7)
-
Step 800
800
#304D87
oklch(42.8% 0.103 262.8)
-
Step 900
900
#2A406C
oklch(37.6% 0.081 263)
-
Step 950
950 (this color)
#0C1830
oklch(21.3% 0.051 262.8)
#0C1830 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) | #0D1A31 | 0.007 |
| Deuteranopia (no green cones) | #08172F | 0.007 |
| Tritanopia (no blue cones) | #001D21 | 0.042 |
| Achromatopsia (no color) | #191919 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C1830
#0C1830
oklch(21.3% 0.051 262.8)
- #231700
#231700
oklch(21.4% 0.044 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 #0C1830, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.018
- Dark #1B2431 ΔE 0.051
- Navy Blue #001146 ΔE 0.052
- Rich Navy #001219 ΔE 0.055
- Oxford Blue #1B263B ΔE 0.057
- Jet #212529 ΔE 0.064
- Dark Navy #000435 ΔE 0.070
- Night Blue #040348 ΔE 0.073
Use #0C1830 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.