#231738
Closest named color: Oxford Blue (#1B263B). oklch(23.9% 0.062 298.3), rgb(35, 23, 56).
Aa
White text reads best on this color (16.78:1).
About this color
#231738 is a very dark, muted purple. In OKLCH its lightness is 24%, its chroma 0.062 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.048 away. White text reads best on it, at 16.78:1.
| Hue family | Purples |
| Lightness | very dark (24%) |
| Chroma | muted (0.062) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.25:1 |
| White text | 16.78:1 |
Values
| HEX | #231738 |
| RGB | rgb(35, 23, 56) |
| HSL | hsl(262, 42%, 15%) |
| OKLCH | oklch(23.9% 0.062 298.3) |
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 #231738 | 16.78:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #231738 | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #231738 text on white | 16.78:1 | AAA | Lc 103.6 | Preferred for body text |
| #231738 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F7
oklch(93.6% 0.022 297.4)
-
Step 200
200
#DCD4F1
oklch(88.5% 0.04 298.2)
-
Step 300
300
#C6B7EA
oklch(80.9% 0.073 298.2)
-
Step 400
400
#AA90E0
oklch(70.7% 0.117 298.3)
-
Step 500
500
#9672D7
oklch(63.1% 0.15 298.4)
-
Step 600
600
#8158C5
oklch(55.6% 0.164 298.2)
-
Step 700
700
#6D47AA
oklch(49% 0.153 298.3)
-
Step 800
800
#593B8A
oklch(42.7% 0.127 298.4)
-
Step 900
900
#49346E
oklch(37.8% 0.097 298.3)
-
Step 950
950 (this color)
#231738
oklch(23.9% 0.062 298.3)
#231738 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) | #0B1D39 | 0.041 |
| Deuteranopia (no green cones) | #0E1D37 | 0.039 |
| Tritanopia (no blue cones) | #1F1D24 | 0.049 |
| Achromatopsia (no color) | #1D1D1D | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231738
#231738
oklch(23.9% 0.062 298.3)
- #1D2200
#1D2200
oklch(23.8% 0.055 117.5)
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 #231738, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.048
- Dark #1B2431 ΔE 0.049
- Rich Black #0D1B2A ΔE 0.051
- Midnight Purple #280137 ΔE 0.053
- Dark Purple #35063E ΔE 0.053
- Very Dark Purple #2A0134 ΔE 0.054
- Eggplant #380835 ΔE 0.055
- Deep Purple #36013F ΔE 0.061
Use #231738 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.