#0B231D
Closest named color: Jet (#212529). oklch(23.5% 0.032 174.7), rgb(11, 35, 29).
Aa
White text reads best on this color (16.50:1).
About this color
#0B231D is a very dark, muted teal or cyan. In OKLCH its lightness is 23%, its chroma 0.032 and its hue 175°. Its hue sits on the cool side of the wheel. The nearest named color is Jet (#212529), ΔE 0.041 away. White text reads best on it, at 16.50:1.
| Hue family | Teals and cyans |
| Lightness | very dark (23%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Jet (#212529) |
| Black text | 1.27:1 |
| White text | 16.50:1 |
Values
| HEX | #0B231D |
| RGB | rgb(11, 35, 29) |
| HSL | hsl(165, 52%, 9%) |
| OKLCH | oklch(23.5% 0.032 174.7) |
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 #0B231D | 16.50:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #0B231D | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #0B231D text on white | 16.50:1 | AAA | Lc 103.4 | Preferred for body text |
| #0B231D 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CBDED8
oklch(88.5% 0.022 174.9)
-
Step 300
300
#A8C9BF
oklch(80.9% 0.038 175)
-
Step 400
400
#78AE9E
oklch(70.8% 0.062 174)
-
Step 500
500
#519986
oklch(63% 0.079 174.5)
-
Step 600
600
#318470
oklch(55.7% 0.086 174.3)
-
Step 700
700
#236F5E
oklch(49.1% 0.079 175.1)
-
Step 800
800
#1F5B4D
oklch(42.8% 0.066 174.8)
-
Step 900
900
#204A40
oklch(37.6% 0.05 175.7)
-
Step 950
950 (this color)
#0B231D
oklch(23.5% 0.032 174.7)
#0B231D 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) | #22201D | 0.035 |
| Deuteranopia (no green cones) | #1E1E1D | 0.032 |
| Tritanopia (no blue cones) | #022321 | 0.011 |
| Achromatopsia (no color) | #1F1F1F | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B231D
#0B231D
oklch(23.5% 0.032 174.7)
- #2A171F
#2A171F
oklch(23.4% 0.033 353.2)
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 #0B231D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.045
- Dark #1B2431 ΔE 0.046
- Dark Forest Green #002D04 ΔE 0.062
- Oxford Blue #1B263B ΔE 0.063
- Very Dark Green #062E03 ΔE 0.065
- Rich Navy #001219 ΔE 0.071
- Dark Brown #341C02 ΔE 0.074
Use #0B231D 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.