#23151B
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.025 352), rgb(35, 21, 27).
Aa
White text reads best on this color (17.57:1).
About this color
#23151B is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.047 away. White text reads best on it, at 17.57:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.57:1 |
Values
| HEX | #23151B |
| RGB | rgb(35, 21, 27) |
| HSL | hsl(334, 25%, 11%) |
| OKLCH | oklch(21.7% 0.025 352) |
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 #23151B | 17.57:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #23151B | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #23151B text on white | 17.57:1 | AAA | Lc 104.4 | Preferred for body text |
| #23151B text on black | 1.19:1 | 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#EFE8EA
oklch(93.7% 0.008 357.8)
-
Step 200
200
#E2D5DA
oklch(88.5% 0.016 352)
-
Step 300
300
#D1B9C2
oklch(80.9% 0.03 353.1)
-
Step 400
400
#B995A4
oklch(70.7% 0.048 351.5)
-
Step 500
500
#A77B8D
oklch(63.2% 0.06 352.6)
-
Step 600
600
#926377
oklch(55.6% 0.067 352.3)
-
Step 700
700
#7C5264
oklch(49.1% 0.061 352.3)
-
Step 800
800
#654352
oklch(42.6% 0.052 351.4)
-
Step 900
900
#523944
oklch(37.7% 0.039 351.1)
-
Step 950
950 (this color)
#23151B
oklch(21.7% 0.025 352)
#23151B 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) | #16181B | 0.028 |
| Deuteranopia (no green cones) | #1A1A1B | 0.024 |
| Tritanopia (no blue cones) | #251517 | 0.009 |
| Achromatopsia (no color) | #191919 | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23151B
#23151B
oklch(21.7% 0.025 352)
- #0D1E18
#0D1E18
oklch(21.8% 0.026 169.2)
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 #23151B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.047
- Jet #212529 ΔE 0.054
- Dark #1B2431 ΔE 0.057
- Dark Brown #341C02 ΔE 0.064
- Rich Navy #001219 ΔE 0.070
- Dark Maroon #3C0008 ΔE 0.070
- Oxford Blue #1B263B ΔE 0.072
- Almost Black #070D0D ΔE 0.073
Use #23151B 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.