#281B37
Closest named color: Oxford Blue (#1B263B). oklch(25.3% 0.054 304.2), rgb(40, 27, 55).
Aa
White text reads best on this color (16.12:1).
About this color
#281B37 is a dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.054 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.039 away. White text reads best on it, at 16.12:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | muted (0.054) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.12:1 |
Values
| HEX | #281B37 |
| RGB | rgb(40, 27, 55) |
| HSL | hsl(268, 34%, 16%) |
| OKLCH | oklch(25.3% 0.054 304.2) |
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 #281B37 | 16.12:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #281B37 | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #281B37 text on white | 16.12:1 | AAA | Lc 103.0 | Preferred for body text |
| #281B37 text on black | 1.30:1 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#ECE7F4
oklch(93.6% 0.018 303.4)
-
Step 200
200
#DED4ED
oklch(88.6% 0.036 303.8)
-
Step 300
300
#C9B7E3
oklch(80.9% 0.064 303.6)
-
Step 400
400
#AF90D4
oklch(70.6% 0.102 304.8)
-
Step 500
500
#9B74C9
oklch(63.2% 0.13 304.1)
-
Step 600
600
#865BB5
oklch(55.6% 0.14 304.3)
-
Step 700
700
#724A9C
oklch(49.1% 0.131 304.5)
-
Step 800
800
#5C3D7F
oklch(42.6% 0.11 303.8)
-
Step 900
900
#4C3566
oklch(37.8% 0.085 304.3)
-
Step 950
950 (this color)
#281B37
oklch(25.3% 0.054 304.2)
#281B37 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 | 0.038 |
| Deuteranopia (no green cones) | #172136 | 0.035 |
| Tritanopia (no blue cones) | #262026 | 0.041 |
| Achromatopsia (no color) | #212121 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #281B37
#281B37
oklch(25.3% 0.054 304.2)
- #1D2606
#1D2606
oklch(25.2% 0.053 123.5)
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 #281B37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.039
- Dark #1B2431 ΔE 0.040
- Jet #212529 ΔE 0.050
- Eggplant #380835 ΔE 0.053
- Rich Black #0D1B2A ΔE 0.055
- Dark Purple #35063E ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.058
- Aubergine #3D0734 ΔE 0.060
Use #281B37 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.