#23131C
Closest named color: Rich Black (#0D1B2A). oklch(21.2% 0.031 345.2), rgb(35, 19, 28).
Aa
White text reads best on this color (17.77:1).
About this color
#23131C is a very dark, muted red. In OKLCH its lightness is 21%, its chroma 0.031 and its hue 345°. Its hue sits on the warm side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.049 away. White text reads best on it, at 17.77:1.
| Hue family | Reds |
| Lightness | very dark (21%) |
| Chroma | muted (0.031) |
| Temperature | warm |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.77:1 |
Values
| HEX | #23131C |
| RGB | rgb(35, 19, 28) |
| HSL | hsl(326, 30%, 11%) |
| OKLCH | oklch(21.2% 0.031 345.2) |
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 #23131C | 17.77:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #23131C | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #23131C text on white | 17.77:1 | AAA | Lc 104.5 | Preferred for body text |
| #23131C text on black | 1.18:1 | 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
#EFE7EB
oklch(93.5% 0.01 345.4)
-
Step 200
200
#E4D4DC
oklch(88.5% 0.021 345.7)
-
Step 300
300
#D3B8C6
oklch(81% 0.036 345.3)
-
Step 400
400
#BC92A9
oklch(70.6% 0.059 344.7)
-
Step 500
500
#AA7794
oklch(63% 0.075 344.4)
-
Step 600
600
#95607E
oklch(55.6% 0.08 345)
-
Step 700
700
#7F4F6A
oklch(49.1% 0.074 345.4)
-
Step 800
800
#674157
oklch(42.7% 0.062 344.4)
-
Step 900
900
#543747
oklch(37.6% 0.048 345.4)
-
Step 950
950 (this color)
#23131C
oklch(21.2% 0.031 345.2)
#23131C 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) | #14161C | 0.032 |
| Deuteranopia (no green cones) | #18191C | 0.030 |
| Tritanopia (no blue cones) | #251316 | 0.013 |
| Achromatopsia (no color) | #181818 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23131C
#23131C
oklch(21.2% 0.031 345.2)
- #0A1D15
#0A1D15
oklch(21.2% 0.03 164.4)
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 #23131C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.049
- Jet #212529 ΔE 0.060
- Dark #1B2431 ΔE 0.061
- Dark Maroon #3C0008 ΔE 0.069
- Rich Navy #001219 ΔE 0.070
- Dark Brown #341C02 ΔE 0.070
- Almost Black #070D0D ΔE 0.072
- Very Dark Purple #2A0134 ΔE 0.073
Use #23131C 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.