#0B1923
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.028 241), rgb(11, 25, 35).
Aa
White text reads best on this color (17.83:1).
About this color
#0B1923 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.028. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.015 away. White text reads best on it, at 17.83:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.028) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.83:1 |
Values
| HEX | #0B1923 |
| RGB | rgb(11, 25, 35) |
| HSL | hsl(205, 52%, 9%) |
| OKLCH | oklch(20.6% 0.028 241) |
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 #0B1923 | 17.83:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #0B1923 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #0B1923 text on white | 17.83:1 | AAA | Lc 104.6 | Preferred for body text |
| #0B1923 text on black | 1.17:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AEC4D4
oklch(80.9% 0.033 239.5)
-
Step 400
400
#83A5BF
oklch(70.6% 0.053 241.4)
-
Step 500
500
#648FAF
oklch(63.1% 0.068 241.3)
-
Step 600
600
#4A799B
oklch(55.7% 0.074 241.3)
-
Step 700
700
#3B6684
oklch(49.2% 0.068 240.5)
-
Step 800
800
#31536B
oklch(42.7% 0.056 240.6)
-
Step 900
900
#2C4557
oklch(37.8% 0.044 240.7)
-
Step 950
950 (this color)
#0B1923
oklch(20.6% 0.028 241)
#0B1923 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) | #151923 | 0.016 |
| Deuteranopia (no green cones) | #111623 | 0.013 |
| Tritanopia (no blue cones) | #011B1C | 0.023 |
| Achromatopsia (no color) | #181818 | 0.028 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1923
#0B1923
oklch(20.6% 0.028 241)
- #21140A
#21140A
oklch(20.6% 0.028 58)
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 #0B1923, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.015
- Rich Navy #001219 ΔE 0.038
- Dark #1B2431 ΔE 0.052
- Almost Black #070D0D ΔE 0.058
- Jet #212529 ΔE 0.059
- Oxford Blue #1B263B ΔE 0.066
- Navy Blue #001146 ΔE 0.077
- Dark Navy #000435 ΔE 0.084
Use #0B1923 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.