#0C2129
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.031 225.4), rgb(12, 33, 41).
Aa
White text reads best on this color (16.59:1).
About this color
#0C2129 is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.031 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.023 away. White text reads best on it, at 16.59:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.59:1 |
Values
| HEX | #0C2129 |
| RGB | rgb(12, 33, 41) |
| HSL | hsl(197, 55%, 10%) |
| OKLCH | oklch(23.4% 0.031 225.4) |
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 #0C2129 | 16.59:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #0C2129 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #0C2129 text on white | 16.59:1 | AAA | Lc 103.5 | Preferred for body text |
| #0C2129 text on black | 1.26:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE3
oklch(88.5% 0.02 225.7)
-
Step 300
300
#A8C6D3
oklch(80.9% 0.037 225.9)
-
Step 400
400
#79A9BC
oklch(70.7% 0.058 224.5)
-
Step 500
500
#5493AC
oklch(63.1% 0.075 225.7)
-
Step 600
600
#367D97
oklch(55.6% 0.081 225.3)
-
Step 700
700
#276981
oklch(49% 0.076 225.7)
-
Step 800
800
#225669
oklch(42.7% 0.063 225.3)
-
Step 900
900
#224755
oklch(37.7% 0.049 225.1)
-
Step 950
950 (this color)
#0C2129
oklch(23.4% 0.031 225.4)
#0C2129 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) | #1D2029 | 0.024 |
| Deuteranopia (no green cones) | #181D29 | 0.021 |
| Tritanopia (no blue cones) | #002324 | 0.019 |
| Achromatopsia (no color) | #1E1E1E | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C2129
#0C2129
oklch(23.4% 0.031 225.4)
- #2A1911
#2A1911
oklch(23.3% 0.031 46)
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 #0C2129, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.023
- Dark #1B2431 ΔE 0.029
- Jet #212529 ΔE 0.036
- Oxford Blue #1B263B ΔE 0.043
- Rich Navy #001219 ΔE 0.065
- Space Cadet #2B2D42 ΔE 0.077
- Gunmetal #293241 ΔE 0.083
- Navy Blue #001146 ΔE 0.083
Use #0C2129 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.