#281B33
Closest named color: Dark (#1B2431). oklch(25% 0.047 308.2), rgb(40, 27, 51).
Aa
White text reads best on this color (16.21:1).
About this color
#281B33 is a dark, muted purple. In OKLCH its lightness is 25%, its chroma 0.047 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.038 away. White text reads best on it, at 16.21:1.
| Hue family | Purples |
| Lightness | dark (25%) |
| Chroma | muted (0.047) |
| Temperature | in between |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.21:1 |
Values
| HEX | #281B33 |
| RGB | rgb(40, 27, 51) |
| HSL | hsl(273, 31%, 15%) |
| OKLCH | oklch(25% 0.047 308.2) |
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 #281B33 | 16.21:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #281B33 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #281B33 text on white | 16.21:1 | AAA | Lc 103.1 | Preferred for body text |
| #281B33 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F2
oklch(93.6% 0.016 310.1)
-
Step 200
200
#DFD4E9
oklch(88.5% 0.031 309.1)
-
Step 300
300
#CBB7DD
oklch(80.8% 0.057 308.8)
-
Step 400
400
#B092CC
oklch(70.8% 0.089 307.8)
-
Step 500
500
#9D75BF
oklch(63% 0.116 308.2)
-
Step 600
600
#885DAB
oklch(55.6% 0.125 308.3)
-
Step 700
700
#734C93
oklch(49.1% 0.117 308)
-
Step 800
800
#5E3F77
oklch(42.8% 0.096 308.4)
-
Step 900
900
#4D3660
oklch(37.8% 0.075 308.4)
-
Step 950
950 (this color)
#281B33
oklch(25% 0.047 308.2)
#281B33 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) | #162034 | 0.035 |
| Deuteranopia (no green cones) | #192132 | 0.033 |
| Tritanopia (no blue cones) | #271F24 | 0.035 |
| Achromatopsia (no color) | #202020 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #281B33
#281B33
oklch(25% 0.047 308.2)
- #1B260B
#1B260B
oklch(25.1% 0.048 128)
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 #281B33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.040
- Jet #212529 ΔE 0.045
- Rich Black #0D1B2A ΔE 0.052
- Eggplant #380835 ΔE 0.055
- Space Cadet #2B2D42 ΔE 0.059
- Dark Purple #35063E ΔE 0.060
- Aubergine #3D0734 ΔE 0.061
Use #281B33 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.