#231C37
Closest named color: Oxford Blue (#1B263B). oklch(24.9% 0.051 294.4), rgb(35, 28, 55).
Aa
White text reads best on this color (16.24:1).
About this color
#231C37 is a very dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.051 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.033 away. White text reads best on it, at 16.24:1.
| Hue family | Purples |
| Lightness | very dark (25%) |
| Chroma | muted (0.051) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.24:1 |
Values
| HEX | #231C37 |
| RGB | rgb(35, 28, 55) |
| HSL | hsl(256, 33%, 16%) |
| OKLCH | oklch(24.9% 0.051 294.4) |
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 #231C37 | 16.24:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #231C37 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #231C37 text on white | 16.24:1 | AAA | Lc 103.1 | Preferred for body text |
| #231C37 text on black | 1.29:1 | 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
#EAE8F5
oklch(93.6% 0.018 293.1)
-
Step 200
200
#DAD5EE
oklch(88.5% 0.034 294.9)
-
Step 300
300
#C2BAE4
oklch(80.9% 0.059 293.8)
-
Step 400
400
#A495D7
oklch(70.7% 0.096 294.2)
-
Step 500
500
#8E79CC
oklch(63% 0.123 294.2)
-
Step 600
600
#7961B9
oklch(55.6% 0.134 294.2)
-
Step 700
700
#66509F
oklch(49.1% 0.123 294.2)
-
Step 800
800
#534281
oklch(42.8% 0.102 294.1)
-
Step 900
900
#453867
oklch(37.7% 0.079 295.1)
-
Step 950
950 (this color)
#231C37
oklch(24.9% 0.051 294.4)
#231C37 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) | #142138 | 0.028 |
| Deuteranopia (no green cones) | #152036 | 0.026 |
| Tritanopia (no blue cones) | #1F2126 | 0.042 |
| Achromatopsia (no color) | #202020 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231C37
#231C37
oklch(24.9% 0.051 294.4)
- #212404
#212404
oklch(24.9% 0.05 114.6)
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 #231C37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Dark #1B2431 ΔE 0.034
- Jet #212529 ΔE 0.046
- Rich Black #0D1B2A ΔE 0.047
- Space Cadet #2B2D42 ΔE 0.058
- Eggplant #380835 ΔE 0.062
- Dark Purple #35063E ΔE 0.064
- Midnight Purple #280137 ΔE 0.069
Use #231C37 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.