#231B23
Closest named color: Jet (#212529). oklch(23.5% 0.019 326.2), rgb(35, 27, 35).
Aa
White text reads best on this color (16.76:1).
About this color
#231B23 is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.019. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.033 away. White text reads best on it, at 16.76:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.019) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.25:1 |
| White text | 16.76:1 |
Values
| HEX | #231B23 |
| RGB | rgb(35, 27, 35) |
| HSL | hsl(300, 13%, 12%) |
| OKLCH | oklch(23.5% 0.019 326.2) |
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 #231B23 | 16.76:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #231B23 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #231B23 text on white | 16.76:1 | AAA | Lc 103.7 | Preferred for body text |
| #231B23 text on black | 1.25:1 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#ECE8EC
oklch(93.5% 0.007 325.6)
-
Step 200
200
#DED6DE
oklch(88.5% 0.014 325.7)
-
Step 300
300
#C9BCC9
oklch(81% 0.023 325.8)
-
Step 400
400
#AD99AD
oklch(70.7% 0.037 326)
-
Step 500
500
#998099
oklch(63.1% 0.047 326.1)
-
Step 600
600
#836983
oklch(55.5% 0.05 326.2)
-
Step 700
700
#6F586F
oklch(49.2% 0.046 326.2)
-
Step 800
800
#5A485B
oklch(42.7% 0.039 324.5)
-
Step 900
900
#4A3C4A
oklch(37.6% 0.03 326.2)
-
Step 950
950 (this color)
#231B23
oklch(23.5% 0.019 326.2)
#231B23 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) | #1B1D23 | 0.016 |
| Deuteranopia (no green cones) | #1C1E23 | 0.016 |
| Tritanopia (no blue cones) | #241C1E | 0.012 |
| Achromatopsia (no color) | #1D1D1D | 0.020 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231B23
#231B23
oklch(23.5% 0.019 326.2)
- #182119
#182119
oklch(23.6% 0.02 147.9)
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 #231B23, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.033
- Dark #1B2431 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.040
- Oxford Blue #1B263B ΔE 0.051
- Dark Brown #341C02 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.075
- Eggplant #380835 ΔE 0.077
- Rich Navy #001219 ΔE 0.077
Use #231B23 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.