#23131A
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.029 352), rgb(35, 19, 26).
Aa
White text reads best on this color (17.80:1).
About this color
#23131A is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.050 away. White text reads best on it, at 17.80:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.80:1 |
Values
| HEX | #23131A |
| RGB | rgb(35, 19, 26) |
| HSL | hsl(334, 30%, 11%) |
| OKLCH | oklch(21.2% 0.029 352) |
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 #23131A | 17.80:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #23131A | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #23131A text on white | 17.80:1 | AAA | Lc 104.5 | Preferred for body text |
| #23131A 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
#F8F4F6
oklch(97.1% 0.005 345.3)
-
Step 100
100
#F0E7EA
oklch(93.6% 0.011 354.9)
-
Step 200
200
#E4D4DA
oklch(88.5% 0.019 352.7)
-
Step 300
300
#D3B8C3
oklch(80.9% 0.034 351.4)
-
Step 400
400
#BD93A4
oklch(70.8% 0.055 352.4)
-
Step 500
500
#AB788E
oklch(63.1% 0.07 351.7)
-
Step 600
600
#966078
oklch(55.5% 0.077 351.7)
-
Step 700
700
#805065
oklch(49.2% 0.07 352.2)
-
Step 800
800
#684152
oklch(42.6% 0.059 352.2)
-
Step 900
900
#553744
oklch(37.6% 0.047 352)
-
Step 950
950 (this color)
#23131A
oklch(21.2% 0.029 352)
#23131A 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) | #15161A | 0.030 |
| Deuteranopia (no green cones) | #18191A | 0.030 |
| Tritanopia (no blue cones) | #251215 | 0.010 |
| Achromatopsia (no color) | #181818 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23131A
#23131A
oklch(21.2% 0.029 352)
- #091D17
#091D17
oklch(21.2% 0.029 171.5)
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 #23131A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.050
- Jet #212529 ΔE 0.060
- Dark #1B2431 ΔE 0.062
- Dark Brown #341C02 ΔE 0.068
- Dark Maroon #3C0008 ΔE 0.068
- Rich Navy #001219 ΔE 0.069
- Almost Black #070D0D ΔE 0.070
- Very Dark Brown #1D0200 ΔE 0.071
Use #23131A 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.