#281F37
Closest named color: Oxford Blue (#1B263B). oklch(26.2% 0.045 300.6), rgb(40, 31, 55).
Aa
White text reads best on this color (15.65:1).
About this color
#281F37 is a dark, muted purple. In OKLCH its lightness is 26%, its chroma 0.045 and its hue 301°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 15.65:1.
| Hue family | Purples |
| Lightness | dark (26%) |
| Chroma | muted (0.045) |
| Temperature | in between |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.34:1 |
| White text | 15.65:1 |
Values
| HEX | #281F37 |
| RGB | rgb(40, 31, 55) |
| HSL | hsl(263, 28%, 17%) |
| OKLCH | oklch(26.2% 0.045 300.6) |
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 #281F37 | 15.65:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #281F37 | 1.34:1 | Fails | Lc 0.0 | Not readable |
| #281F37 text on white | 15.65:1 | AAA | Lc 102.6 | Preferred for body text |
| #281F37 text on black | 1.34:1 | 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
#EBE8F3
oklch(93.7% 0.015 298.6)
-
Step 200
200
#DCD5EA
oklch(88.5% 0.029 301)
-
Step 300
300
#C6B9DF
oklch(80.9% 0.055 300.8)
-
Step 400
400
#A994CE
oklch(70.6% 0.086 300.8)
-
Step 500
500
#9479C2
oklch(63% 0.111 300.3)
-
Step 600
600
#7F61AE
oklch(55.6% 0.12 300.5)
-
Step 700
700
#6B5095
oklch(49% 0.11 300.4)
-
Step 800
800
#574279
oklch(42.7% 0.091 300.2)
-
Step 900
900
#483862
oklch(37.7% 0.072 300.5)
-
Step 950
950 (this color)
#281F37
oklch(26.2% 0.045 300.6)
#281F37 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) | #192338 | 0.028 |
| Deuteranopia (no green cones) | #1B2336 | 0.026 |
| Tritanopia (no blue cones) | #252328 | 0.036 |
| Achromatopsia (no color) | #232323 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #281F37
#281F37
oklch(26.2% 0.045 300.6)
- #21280D
#21280D
oklch(26.3% 0.046 121.7)
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 #281F37, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.032
- Jet #212529 ΔE 0.040
- Space Cadet #2B2D42 ΔE 0.046
- Rich Black #0D1B2A ΔE 0.056
- Gunmetal #293241 ΔE 0.061
- Eggplant #380835 ΔE 0.062
- Dark Purple #35063E ΔE 0.066
Use #281F37 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.