#231B17
Closest named color: Jet (#212529). oklch(23% 0.015 48.1), rgb(35, 27, 23).
Aa
White text reads best on this color (16.92:1).
About this color
#231B17 is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.040 away. White text reads best on it, at 16.92:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.24:1 |
| White text | 16.92:1 |
Values
| HEX | #231B17 |
| RGB | rgb(35, 27, 23) |
| HSL | hsl(20, 21%, 11%) |
| OKLCH | oklch(23% 0.015 48.1) |
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 #231B17 | 16.92:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #231B17 | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #231B17 text on white | 16.92:1 | AAA | Lc 103.8 | Preferred for body text |
| #231B17 text on black | 1.24:1 | 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
#F7F5F4
oklch(97.1% 0.003 48.7)
-
Step 100
100
#EDE9E7
oklch(93.7% 0.005 48.7)
-
Step 200
200
#DFD7D4
oklch(88.5% 0.01 41.9)
-
Step 300
300
#CBBDB7
oklch(80.8% 0.018 44.8)
-
Step 400
400
#B09C92
oklch(70.7% 0.028 48.3)
-
Step 500
500
#9C8377
oklch(63% 0.036 47.1)
-
Step 600
600
#876D60
oklch(55.6% 0.039 48)
-
Step 700
700
#725B4F
oklch(49.1% 0.036 49)
-
Step 800
800
#5D4A41
oklch(42.6% 0.03 46.7)
-
Step 900
900
#4C3E37
oklch(37.6% 0.023 48.1)
-
Step 950
950 (this color)
#231B17
oklch(23% 0.015 48.1)
#231B17 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) | #1D1C17 | 0.012 |
| Deuteranopia (no green cones) | #1F1D17 | 0.010 |
| Tritanopia (no blue cones) | #251A1A | 0.009 |
| Achromatopsia (no color) | #1D1D1D | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #231B17, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.040
- Dark Brown #341C02 ΔE 0.046
- Dark #1B2431 ΔE 0.050
- Rich Black #0D1B2A ΔE 0.051
- Oxford Blue #1B263B ΔE 0.067
- Chocolate Brown #411900 ΔE 0.069
- Rich Navy #001219 ΔE 0.077
- Dark Maroon #3C0008 ΔE 0.078
Use #231B17 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.