#281D4A
Closest named color: Oxford Blue (#1B263B). oklch(27.1% 0.08 291.4), rgb(40, 29, 74).
Aa
White text reads best on this color (15.38:1).
About this color
#281D4A is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.080 and its hue 291°. 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 15.38:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.080) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.38:1 |
Values
| HEX | #281D4A |
| RGB | rgb(40, 29, 74) |
| HSL | hsl(255, 44%, 20%) |
| OKLCH | oklch(27.1% 0.08 291.4) |
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 #281D4A | 15.38:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #281D4A | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #281D4A text on white | 15.38:1 | AAA | Lc 102.1 | Preferred for body text |
| #281D4A text on black | 1.36:1 | 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
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D9D4FA
oklch(88.6% 0.052 291.3)
-
Step 300
300
#C1B6FA
oklch(80.9% 0.095 291.5)
-
Step 400
400
#A38DF7
oklch(70.7% 0.152 291.6)
-
Step 500
500
#8E6CF3
oklch(63.1% 0.194 291.4)
-
Step 600
600
#7A4FE2
oklch(55.6% 0.211 291.4)
-
Step 700
700
#673EC4
oklch(49% 0.197 291.5)
-
Step 800
800
#54359F
oklch(42.8% 0.163 291.4)
-
Step 900
900
#45307E
oklch(37.8% 0.126 291.6)
-
Step 950
950 (this color)
#281D4A
oklch(27.1% 0.08 291.4)
#281D4A 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) | #07254C | 0.048 |
| Deuteranopia (no green cones) | #092449 | 0.046 |
| Tritanopia (no blue cones) | #1F2730 | 0.066 |
| Achromatopsia (no color) | #252525 | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #281D4A
#281D4A
oklch(27.1% 0.08 291.4)
- #282900
#282900
oklch(27.1% 0.06 111.2)
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 #281D4A, 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 Indigo #1F0954 ΔE 0.053
- Space Cadet #2B2D42 ΔE 0.056
- Dark Purple #35063E ΔE 0.058
- Dark #1B2431 ΔE 0.061
- Eggplant #380835 ΔE 0.066
- Deep Purple #36013F ΔE 0.066
- Marine #042E60 ΔE 0.068
Use #281D4A 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.