#23151F
Closest named color: Rich Black (#0D1B2A). oklch(21.9% 0.029 337.5), rgb(35, 21, 31).
Aa
White text reads best on this color (17.52:1).
About this color
#23151F is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.044 away. White text reads best on it, at 17.52:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.52:1 |
Values
| HEX | #23151F |
| RGB | rgb(35, 21, 31) |
| HSL | hsl(317, 25%, 11%) |
| OKLCH | oklch(21.9% 0.029 337.5) |
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 #23151F | 17.52:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #23151F | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #23151F text on white | 17.52:1 | AAA | Lc 104.3 | Preferred for body text |
| #23151F 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
#EEE7EC
oklch(93.5% 0.01 335.5)
-
Step 200
200
#E2D5DE
oklch(88.6% 0.019 336.6)
-
Step 300
300
#D0B9C8
oklch(81% 0.033 338.7)
-
Step 400
400
#B894AD
oklch(70.7% 0.055 337.5)
-
Step 500
500
#A67999
oklch(63.1% 0.071 337.4)
-
Step 600
600
#906283
oklch(55.6% 0.075 337.5)
-
Step 700
700
#7B516F
oklch(49.2% 0.071 337.7)
-
Step 800
800
#64425A
oklch(42.6% 0.059 338)
-
Step 900
900
#52384A
oklch(37.7% 0.046 338.4)
-
Step 950
950 (this color)
#23151F
oklch(21.9% 0.029 337.5)
#23151F 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) | #15181F | 0.029 |
| Deuteranopia (no green cones) | #191A1F | 0.026 |
| Tritanopia (no blue cones) | #251519 | 0.013 |
| Achromatopsia (no color) | #191919 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23151F
#23151F
oklch(21.9% 0.029 337.5)
- #0E1E15
#0E1E15
oklch(21.7% 0.028 158.3)
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 #23151F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.044
- Jet #212529 ΔE 0.053
- Dark #1B2431 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.067
- Dark Brown #341C02 ΔE 0.069
- Rich Navy #001219 ΔE 0.071
- Eggplant #380835 ΔE 0.072
- Dark Maroon #3C0008 ΔE 0.072
Use #23151F 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.