#0C212F
Closest named color: Rich Black (#0D1B2A). oklch(23.8% 0.038 240.2), rgb(12, 33, 47).
Aa
White text reads best on this color (16.48:1).
About this color
#0C212F is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.038 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.022 away. White text reads best on it, at 16.48:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.27:1 |
| White text | 16.48:1 |
Values
| HEX | #0C212F |
| RGB | rgb(12, 33, 47) |
| HSL | hsl(204, 59%, 12%) |
| OKLCH | oklch(23.8% 0.038 240.2) |
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 #0C212F | 16.48:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #0C212F | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #0C212F text on white | 16.48:1 | AAA | Lc 103.3 | Preferred for body text |
| #0C212F text on black | 1.27:1 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CBDCE8
oklch(88.5% 0.025 238.4)
-
Step 300
300
#A7C5DB
oklch(80.8% 0.045 239.9)
-
Step 400
400
#77A7CA
oklch(70.7% 0.073 240.7)
-
Step 500
500
#5191BC
oklch(63.2% 0.093 239.9)
-
Step 600
600
#337AA8
oklch(55.5% 0.1 240.5)
-
Step 700
700
#256790
oklch(49.2% 0.093 240)
-
Step 800
800
#205475
oklch(42.7% 0.077 240.1)
-
Step 900
900
#20465E
oklch(37.8% 0.06 238.8)
-
Step 950
950 (this color)
#0C212F
oklch(23.8% 0.038 240.2)
#0C212F 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) | #1B2130 | 0.021 |
| Deuteranopia (no green cones) | #161D2F | 0.018 |
| Tritanopia (no blue cones) | #002426 | 0.027 |
| Achromatopsia (no color) | #1F1F1F | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C212F
#0C212F
oklch(23.8% 0.038 240.2)
- #2C1A0B
#2C1A0B
oklch(23.8% 0.038 59.2)
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 #0C212F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.022
- Dark #1B2431 ΔE 0.025
- Oxford Blue #1B263B ΔE 0.035
- Jet #212529 ΔE 0.038
- Rich Navy #001219 ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.072
- Navy Blue #001146 ΔE 0.074
- Gunmetal #293241 ΔE 0.079
Use #0C212F 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.