#0C182D
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.045 260.9), rgb(12, 24, 45).
Aa
White text reads best on this color (17.73:1).
About this color
#0C182D is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.045 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.014 away. White text reads best on it, at 17.73:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.73:1 |
Values
| HEX | #0C182D |
| RGB | rgb(12, 24, 45) |
| HSL | hsl(218, 58%, 11%) |
| OKLCH | oklch(21% 0.045 260.9) |
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 #0C182D | 17.73:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #0C182D | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #0C182D text on white | 17.73:1 | AAA | Lc 104.4 | Preferred for body text |
| #0C182D 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CEDAED
oklch(88.5% 0.029 259.6)
-
Step 300
300
#ADC2E4
oklch(81% 0.053 260)
-
Step 400
400
#82A1D6
oklch(70.6% 0.085 260.9)
-
Step 500
500
#6389CC
oklch(63.1% 0.11 261.2)
-
Step 600
600
#4A72B8
oklch(55.6% 0.118 260.9)
-
Step 700
700
#3B5F9F
oklch(49% 0.111 261.1)
-
Step 800
800
#314E81
oklch(42.7% 0.092 261)
-
Step 900
900
#2B4167
oklch(37.6% 0.071 260.8)
-
Step 950
950 (this color)
#0C182D
oklch(21% 0.045 260.9)
#0C182D 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) | #0F1A2E | 0.009 |
| Deuteranopia (no green cones) | #0B172D | 0.004 |
| Tritanopia (no blue cones) | #001D20 | 0.039 |
| Achromatopsia (no color) | #181818 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C182D
#0C182D
oklch(21% 0.045 260.9)
- #231600
#231600
oklch(21.2% 0.044 80.4)
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 #0C182D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.014
- Rich Navy #001219 ΔE 0.050
- Dark #1B2431 ΔE 0.051
- Navy Blue #001146 ΔE 0.057
- Oxford Blue #1B263B ΔE 0.059
- Jet #212529 ΔE 0.063
- Dark Navy #000435 ΔE 0.072
- Almost Black #070D0D ΔE 0.072
Use #0C182D 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.