#231B2B
Closest named color: Dark (#1B2431). oklch(23.9% 0.032 307), rgb(35, 27, 43).
Aa
White text reads best on this color (16.62:1).
About this color
#231B2B is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.032 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.031 away. White text reads best on it, at 16.62:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.032) |
| Temperature | in between |
| Nearest name | Dark (#1B2431) |
| Black text | 1.26:1 |
| White text | 16.62:1 |
Values
| HEX | #231B2B |
| RGB | rgb(35, 27, 43) |
| HSL | hsl(270, 23%, 14%) |
| OKLCH | oklch(23.9% 0.032 307) |
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 #231B2B | 16.62:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #231B2B | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #231B2B text on white | 16.62:1 | AAA | Lc 103.5 | Preferred for body text |
| #231B2B text on black | 1.26:1 | 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#ECE8F0
oklch(93.6% 0.011 308.3)
-
Step 200
200
#DDD6E4
oklch(88.6% 0.02 308.2)
-
Step 300
300
#C7BBD4
oklch(81% 0.037 307.1)
-
Step 400
400
#AA97BF
oklch(70.7% 0.061 306.4)
-
Step 500
500
#967DAE
oklch(63.1% 0.077 307.5)
-
Step 600
600
#80669A
oklch(55.6% 0.084 306.7)
-
Step 700
700
#6C5484
oklch(49% 0.08 306.6)
-
Step 800
800
#58456B
oklch(42.6% 0.066 306.7)
-
Step 900
900
#493A57
oklch(37.7% 0.052 307.7)
-
Step 950
950 (this color)
#231B2B
oklch(23.9% 0.032 307)
#231B2B 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) | #181E2C | 0.022 |
| Deuteranopia (no green cones) | #1A1E2B | 0.019 |
| Tritanopia (no blue cones) | #221D21 | 0.023 |
| Achromatopsia (no color) | #1E1E1E | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231B2B
#231B2B
oklch(23.9% 0.032 307)
- #1B2211
#1B2211
oklch(24% 0.032 126.9)
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 #231B2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.031
- Jet #212529 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.038
- Oxford Blue #1B263B ΔE 0.042
- Eggplant #380835 ΔE 0.067
- Space Cadet #2B2D42 ΔE 0.068
- Very Dark Purple #2A0134 ΔE 0.074
- Aubergine #3D0734 ΔE 0.074
Use #231B2B 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.