#0B212C
Closest named color: Rich Black (#0D1B2A). oklch(23.6% 0.035 232.7), rgb(11, 33, 44).
Aa
White text reads best on this color (16.55:1).
About this color
#0B212C is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.035 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.021 away. White text reads best on it, at 16.55:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.55:1 |
Values
| HEX | #0B212C |
| RGB | rgb(11, 33, 44) |
| HSL | hsl(200, 60%, 11%) |
| OKLCH | oklch(23.6% 0.035 232.7) |
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 #0B212C | 16.55:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #0B212C | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #0B212C text on white | 16.55:1 | AAA | Lc 103.4 | Preferred for body text |
| #0B212C 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A7C6D7
oklch(80.9% 0.041 231.9)
-
Step 400
400
#76A8C3
oklch(70.6% 0.066 232.5)
-
Step 500
500
#5092B4
oklch(63% 0.085 232.7)
-
Step 600
600
#317CA0
oklch(55.6% 0.092 232.7)
-
Step 700
700
#226989
oklch(49.2% 0.085 232)
-
Step 800
800
#1F556F
oklch(42.6% 0.071 232.9)
-
Step 900
900
#20475A
oklch(37.8% 0.055 231.9)
-
Step 950
950 (this color)
#0B212C
oklch(23.6% 0.035 232.7)
#0B212C 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) | #1C212D | 0.024 |
| Deuteranopia (no green cones) | #171D2C | 0.020 |
| Tritanopia (no blue cones) | #002425 | 0.023 |
| Achromatopsia (no color) | #1F1F1F | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B212C
#0B212C
oklch(23.6% 0.035 232.7)
- #2B190E
#2B190E
oklch(23.4% 0.035 51.7)
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 #0B212C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.021
- Dark #1B2431 ΔE 0.027
- Jet #212529 ΔE 0.037
- Oxford Blue #1B263B ΔE 0.040
- Rich Navy #001219 ΔE 0.067
- Space Cadet #2B2D42 ΔE 0.075
- Navy Blue #001146 ΔE 0.078
- Gunmetal #293241 ΔE 0.081
Use #0B212C 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.