#0B211E
Closest named color: Rich Black (#0D1B2A). oklch(22.9% 0.029 183.8), rgb(11, 33, 30).
Aa
White text reads best on this color (16.79:1).
About this color
#0B211E is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.038 away. White text reads best on it, at 16.79:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.79:1 |
Values
| HEX | #0B211E |
| RGB | rgb(11, 33, 30) |
| HSL | hsl(172, 50%, 9%) |
| OKLCH | oklch(22.9% 0.029 183.8) |
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 #0B211E | 16.79:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #0B211E | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #0B211E text on white | 16.79:1 | AAA | Lc 103.6 | Preferred for body text |
| #0B211E text on black | 1.25:1 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDDDA
oklch(88.4% 0.019 184.2)
-
Step 300
300
#A9C8C3
oklch(80.8% 0.034 184.7)
-
Step 400
400
#7AACA4
oklch(70.7% 0.054 183.7)
-
Step 500
500
#55978E
oklch(63% 0.069 184.4)
-
Step 600
600
#378278
oklch(55.7% 0.076 183.5)
-
Step 700
700
#296E65
oklch(49.2% 0.07 183.4)
-
Step 800
800
#245952
oklch(42.6% 0.058 183.7)
-
Step 900
900
#234A44
oklch(37.8% 0.046 182.6)
-
Step 950
950 (this color)
#0B211E
oklch(22.9% 0.029 183.8)
#0B211E 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) | #1F1F1E | 0.030 |
| Deuteranopia (no green cones) | #1C1C1E | 0.030 |
| Tritanopia (no blue cones) | #022220 | 0.009 |
| Achromatopsia (no color) | #1D1D1D | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B211E
#0B211E
oklch(22.9% 0.029 183.8)
- #28171B
#28171B
oklch(22.9% 0.028 4.2)
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 #0B211E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.038
- Jet #212529 ΔE 0.042
- Dark #1B2431 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.062
- Rich Navy #001219 ΔE 0.063
- Dark Forest Green #002D04 ΔE 0.070
- Very Dark Green #062E03 ΔE 0.073
- Dark Brown #341C02 ΔE 0.077
Use #0B211E 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.