#281C4B
Closest named color: Dark Indigo (#1F0954). oklch(27% 0.084 291.6), rgb(40, 28, 75).
Aa
White text reads best on this color (15.46:1).
About this color
#281C4B is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.084 and its hue 292°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.050 away. White text reads best on it, at 15.46:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.084) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.35:1 |
| White text | 15.46:1 |
Values
| HEX | #281C4B |
| RGB | rgb(40, 28, 75) |
| HSL | hsl(255, 46%, 20%) |
| OKLCH | oklch(27% 0.084 291.6) |
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 #281C4B | 15.46:1 | AAA | Lc -104.9 | Preferred for body text |
| Black text on #281C4B | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #281C4B text on white | 15.46:1 | AAA | Lc 102.2 | Preferred for body text |
| #281C4B text on black | 1.35:1 | 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
#EAE7FC
oklch(93.7% 0.028 292.4)
-
Step 200
200
#D9D3FB
oklch(88.4% 0.055 292.1)
-
Step 300
300
#C1B5FC
oklch(80.8% 0.1 291.8)
-
Step 400
400
#A38CFA
oklch(70.7% 0.158 291.5)
-
Step 500
500
#8F6AF7
oklch(63.1% 0.202 291.7)
-
Step 600
600
#7B4CE6
oklch(55.6% 0.22 291.7)
-
Step 700
700
#683BC8
oklch(49.1% 0.205 291.6)
-
Step 800
800
#5433A2
oklch(42.8% 0.169 291.2)
-
Step 900
900
#452E80
oklch(37.6% 0.132 291.7)
-
Step 950
950 (this color)
#281C4B
oklch(27% 0.084 291.6)
#281C4B 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) | #03254D | 0.052 |
| Deuteranopia (no green cones) | #06234A | 0.049 |
| Tritanopia (no blue cones) | #1E2630 | 0.067 |
| Achromatopsia (no color) | #242424 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #281C4B
#281C4B
oklch(27% 0.084 291.6)
- #272900
#272900
oklch(27% 0.06 112.6)
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 #281C4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.050
- Oxford Blue #1B263B ΔE 0.051
- Dark Purple #35063E ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.059
- Dark #1B2431 ΔE 0.064
- Deep Purple #36013F ΔE 0.064
- Eggplant #380835 ΔE 0.065
- Marine #042E60 ΔE 0.069
Use #281C4B 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.