#231317
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.027 3.4), rgb(35, 19, 23).
Aa
White text reads best on this color (17.84:1).
About this color
#231317 is a very dark close to neutral grey. In OKLCH its lightness is 21%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.053 away. White text reads best on it, at 17.84:1.
| Hue family | Neutrals |
| Lightness | very dark (21%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.84:1 |
Values
| HEX | #231317 |
| RGB | rgb(35, 19, 23) |
| HSL | hsl(345, 30%, 11%) |
| OKLCH | oklch(21% 0.027 3.4) |
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 #231317 | 17.84:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #231317 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #231317 text on white | 17.84:1 | AAA | Lc 104.6 | Preferred for body text |
| #231317 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
#F8F4F5
oklch(97.1% 0.004 360)
-
Step 100
100
#F0E7E9
oklch(93.6% 0.01 2)
-
Step 200
200
#E4D4D8
oklch(88.4% 0.018 0.4)
-
Step 300
300
#D4B8BE
oklch(80.8% 0.033 3.3)
-
Step 400
400
#BD949D
oklch(70.7% 0.051 3.8)
-
Step 500
500
#AC7985
oklch(63.1% 0.066 3.6)
-
Step 600
600
#97616F
oklch(55.5% 0.072 2.8)
-
Step 700
700
#81505D
oklch(49.1% 0.068 2.7)
-
Step 800
800
#69424C
oklch(42.7% 0.056 3)
-
Step 900
900
#55383F
oklch(37.7% 0.043 3.5)
-
Step 950
950 (this color)
#231317
oklch(21% 0.027 3.4)
#231317 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) | #151617 | 0.030 |
| Deuteranopia (no green cones) | #191917 | 0.028 |
| Tritanopia (no blue cones) | #261214 | 0.008 |
| Achromatopsia (no color) | #181818 | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231317
#231317
oklch(21% 0.027 3.4)
- #081C1A
#081C1A
oklch(20.9% 0.026 186.8)
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 #231317, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.053
- Jet #212529 ΔE 0.061
- Dark Brown #341C02 ΔE 0.064
- Dark #1B2431 ΔE 0.065
- Dark Maroon #3C0008 ΔE 0.067
- Very Dark Brown #1D0200 ΔE 0.068
- Almost Black #070D0D ΔE 0.069
- Rich Navy #001219 ΔE 0.069
Use #231317 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.