#231B34
Closest named color: Dark (#1B2431). oklch(24.5% 0.047 297.5), rgb(35, 27, 52).
Aa
White text reads best on this color (16.43:1).
About this color
#231B34 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.047 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 16.43:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.047) |
| Temperature | in between |
| Nearest name | Dark (#1B2431) |
| Black text | 1.27:1 |
| White text | 16.43:1 |
Values
| HEX | #231B34 |
| RGB | rgb(35, 27, 52) |
| HSL | hsl(259, 32%, 15%) |
| OKLCH | oklch(24.5% 0.047 297.5) |
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 #231B34 | 16.43:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #231B34 | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #231B34 text on white | 16.43:1 | AAA | Lc 103.3 | Preferred for body text |
| #231B34 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
#EBE8F4
oklch(93.7% 0.016 297.5)
-
Step 200
200
#DBD5EC
oklch(88.5% 0.032 297.7)
-
Step 300
300
#C4B9E1
oklch(80.8% 0.057 297.7)
-
Step 400
400
#A795D2
oklch(70.8% 0.09 297.6)
-
Step 500
500
#9279C6
oklch(63.1% 0.116 298)
-
Step 600
600
#7C61B3
oklch(55.6% 0.126 297.3)
-
Step 700
700
#69509A
oklch(49.1% 0.117 297.5)
-
Step 800
800
#55427D
oklch(42.7% 0.097 297)
-
Step 900
900
#463864
oklch(37.6% 0.075 297.3)
-
Step 950
950 (this color)
#231B34
oklch(24.5% 0.047 297.5)
#231B34 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) | #141F35 | 0.028 |
| Deuteranopia (no green cones) | #161F33 | 0.026 |
| Tritanopia (no blue cones) | #201F25 | 0.036 |
| Achromatopsia (no color) | #1F1F1F | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231B34
#231B34
oklch(24.5% 0.047 297.5)
- #1F2306
#1F2306
oklch(24.5% 0.047 116.6)
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 #231B34, 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 0.044
- Jet #212529 ΔE 0.045
- Eggplant #380835 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.062
- Dark Purple #35063E ΔE 0.064
- Very Dark Purple #2A0134 ΔE 0.067
Use #231B34 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.