#231B1F
Closest named color: Jet (#212529). oklch(23.3% 0.014 346.7), rgb(35, 27, 31).
Aa
White text reads best on this color (16.82:1).
About this color
#231B1F is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.014. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.034 away. White text reads best on it, at 16.82:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.014) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.24:1 |
| White text | 16.82:1 |
Values
| HEX | #231B1F |
| RGB | rgb(35, 27, 31) |
| HSL | hsl(330, 13%, 12%) |
| OKLCH | oklch(23.3% 0.014 346.7) |
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 #231B1F | 16.82:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #231B1F | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #231B1F text on white | 16.82:1 | AAA | Lc 103.8 | Preferred for body text |
| #231B1F 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
#F7F5F6
oklch(97.2% 0.002 345.2)
-
Step 100
100
#ECE8EA
oklch(93.5% 0.005 345.3)
-
Step 200
200
#DED7DA
oklch(88.6% 0.009 349.3)
-
Step 300
300
#C9BCC3
oklch(80.8% 0.017 343.7)
-
Step 400
400
#AE9AA4
oklch(70.7% 0.027 346.1)
-
Step 500
500
#9A818E
oklch(63% 0.036 345.5)
-
Step 600
600
#856B78
oklch(55.7% 0.038 346.8)
-
Step 700
700
#705965
oklch(49.1% 0.035 345.8)
-
Step 800
800
#5B4952
oklch(42.7% 0.028 346.8)
-
Step 900
900
#4B3D44
oklch(37.7% 0.022 346.6)
-
Step 950
950 (this color)
#231B1F
oklch(23.3% 0.014 346.7)
#231B1F 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) | #1C1C1F | 0.014 |
| Deuteranopia (no green cones) | #1D1E1F | 0.015 |
| Tritanopia (no blue cones) | #241B1C | 0.006 |
| 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 #231B1F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.034
- Dark #1B2431 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.043
- Oxford Blue #1B263B ΔE 0.056
- Dark Brown #341C02 ΔE 0.057
- Chocolate Brown #411900 ΔE 0.076
- Rich Navy #001219 ΔE 0.076
- Dark Maroon #3C0008 ΔE 0.079
Use #231B1F 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.