#0C181F
Closest named color: Rich Black (#0D1B2A). oklch(20.1% 0.022 235), rgb(12, 24, 31).
Aa
White text reads best on this color (18.00:1).
About this color
#0C181F is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.022. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 18.00:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.022) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.00:1 |
Values
| HEX | #0C181F |
| RGB | rgb(12, 24, 31) |
| HSL | hsl(202, 44%, 8%) |
| OKLCH | oklch(20.1% 0.022 235) |
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 #0C181F | 18.00:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #0C181F | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #0C181F text on white | 18.00:1 | AAA | Lc 104.7 | Preferred for body text |
| #0C181F text on black | 1.16:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBEE
oklch(93.6% 0.008 228.9)
-
Step 200
200
#D0DBE1
oklch(88.5% 0.015 231.2)
-
Step 300
300
#B1C4CF
oklch(80.9% 0.026 233.1)
-
Step 400
400
#88A5B7
oklch(70.6% 0.042 235.4)
-
Step 500
500
#6A8FA6
oklch(63.1% 0.054 236)
-
Step 600
600
#517991
oklch(55.6% 0.058 235.6)
-
Step 700
700
#41667B
oklch(49.1% 0.054 234.3)
-
Step 800
800
#365364
oklch(42.7% 0.045 235)
-
Step 900
900
#2F4552
oklch(37.8% 0.035 234.9)
-
Step 950
950 (this color)
#0C181F
oklch(20.1% 0.022 235)
#0C181F 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) | #15181F | 0.015 |
| Deuteranopia (no green cones) | #12161F | 0.011 |
| Tritanopia (no blue cones) | #051A1A | 0.018 |
| Achromatopsia (no color) | #171717 | 0.022 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C181F
#0C181F
oklch(20.1% 0.022 235)
- #1E140D
#1E140D
oklch(20.2% 0.021 56.2)
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 #0C181F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Rich Navy #001219 ΔE 0.034
- Almost Black #070D0D ΔE 0.051
- Dark #1B2431 ΔE 0.058
- Jet #212529 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.072
- Navy Blue #001146 ΔE 0.084
- Dark Navy #000435 ΔE 0.087
Use #0C181F 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.