#231B33
Closest named color: Dark (#1B2431). oklch(24.4% 0.046 298.3), rgb(35, 27, 51).
Aa
White text reads best on this color (16.45:1).
About this color
#231B33 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.046 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.034 away. White text reads best on it, at 16.45:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.046) |
| Temperature | in between |
| Nearest name | Dark (#1B2431) |
| Black text | 1.27:1 |
| White text | 16.45:1 |
Values
| HEX | #231B33 |
| RGB | rgb(35, 27, 51) |
| HSL | hsl(260, 31%, 15%) |
| OKLCH | oklch(24.4% 0.046 298.3) |
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 #231B33 | 16.45:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #231B33 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #231B33 text on white | 16.45:1 | AAA | Lc 103.4 | Preferred for body text |
| #231B33 text on black | 1.27:1 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
Step 100
100
#EBE8F3
oklch(93.7% 0.015 298.6)
-
Step 200
200
#DBD5EB
oklch(88.4% 0.031 298.2)
-
Step 300
300
#C5BAE0
oklch(81% 0.054 298.4)
-
Step 400
400
#A795D0
oklch(70.7% 0.087 298.2)
-
Step 500
500
#927AC3
oklch(63.1% 0.11 298.3)
-
Step 600
600
#7D62B0
oklch(55.7% 0.12 298.4)
-
Step 700
700
#695197
oklch(49.1% 0.111 298)
-
Step 800
800
#56427B
oklch(42.7% 0.094 298.5)
-
Step 900
900
#473863
oklch(37.7% 0.074 298.9)
-
Step 950
950 (this color)
#231B33
oklch(24.4% 0.046 298.3)
#231B33 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) | #151F34 | 0.026 |
| Deuteranopia (no green cones) | #161F32 | 0.026 |
| Tritanopia (no blue cones) | #201F24 | 0.036 |
| Achromatopsia (no color) | #1F1F1F | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231B33
#231B33
oklch(24.4% 0.046 298.3)
- #1E2307
#1E2307
oklch(24.4% 0.046 118.5)
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 #231B33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.034
- Oxford Blue #1B263B ΔE 0.037
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.044
- Eggplant #380835 ΔE 0.062
- Space Cadet #2B2D42 ΔE 0.063
- Dark Purple #35063E ΔE 0.065
- Very Dark Purple #2A0134 ΔE 0.067
Use #231B33 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.