#0B211B
Closest named color: Rich Black (#0D1B2A). oklch(22.7% 0.031 173.4), rgb(11, 33, 27).
Aa
White text reads best on this color (16.83:1).
About this color
#0B211B is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.031 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.043 away. White text reads best on it, at 16.83:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.83:1 |
Values
| HEX | #0B211B |
| RGB | rgb(11, 33, 27) |
| HSL | hsl(164, 50%, 9%) |
| OKLCH | oklch(22.7% 0.031 173.4) |
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 #0B211B | 16.83:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #0B211B | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #0B211B text on white | 16.83:1 | AAA | Lc 103.7 | Preferred for body text |
| #0B211B text on black | 1.24:1 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CCDED8
oklch(88.5% 0.021 173.9)
-
Step 300
300
#AAC9BE
oklch(81% 0.037 171.9)
-
Step 400
400
#7BAD9D
oklch(70.7% 0.058 172.7)
-
Step 500
500
#569885
oklch(63% 0.074 173.3)
-
Step 600
600
#38836F
oklch(55.7% 0.081 173.1)
-
Step 700
700
#2A6F5D
oklch(49.3% 0.075 173)
-
Step 800
800
#245A4C
oklch(42.7% 0.062 173.6)
-
Step 900
900
#234A3F
oklch(37.7% 0.049 173.1)
-
Step 950
950 (this color)
#0B211B
oklch(22.7% 0.031 173.4)
#0B211B 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) | #201F1B | 0.032 |
| Deuteranopia (no green cones) | #1C1C1B | 0.030 |
| Tritanopia (no blue cones) | #04211F | 0.010 |
| Achromatopsia (no color) | #1D1D1D | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B211B
#0B211B
oklch(22.7% 0.031 173.4)
- #28161D
#28161D
oklch(22.7% 0.031 355)
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 #0B211B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.046
- Dark #1B2431 ΔE 0.050
- Rich Navy #001219 ΔE 0.064
- Dark Forest Green #002D04 ΔE 0.066
- Oxford Blue #1B263B ΔE 0.067
- Very Dark Green #062E03 ΔE 0.069
- Dark Brown #341C02 ΔE 0.075
Use #0B211B 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.