#281B50
Closest named color: Dark Indigo (#1F0954). oklch(27.2% 0.093 290.1), rgb(40, 27, 80).
Aa
White text reads best on this color (15.40:1).
About this color
#281B50 is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.093 and its hue 290°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.045 away. White text reads best on it, at 15.40:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.093) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.36:1 |
| White text | 15.40:1 |
Values
| HEX | #281B50 |
| RGB | rgb(40, 27, 80) |
| HSL | hsl(255, 50%, 21%) |
| OKLCH | oklch(27.2% 0.093 290.1) |
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 #281B50 | 15.40:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #281B50 | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #281B50 text on white | 15.40:1 | AAA | Lc 102.1 | Preferred for body text |
| #281B50 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E7FE
oklch(93.6% 0.031 289.8)
-
Step 200
200
#D8D3FF
oklch(88.5% 0.06 290.3)
-
Step 300
300
#BFB5FF
oklch(80.8% 0.104 290.1)
-
Step 400
400
#A18BFF
oklch(70.7% 0.166 290.2)
-
Step 500
500
#8D68FF
oklch(63.2% 0.214 290.2)
-
Step 600
600
#7A44F4
oklch(55.6% 0.244 290.1)
-
Step 700
700
#6733D4
oklch(49.1% 0.227 290.1)
-
Step 800
800
#542DAC
oklch(42.8% 0.188 290.1)
-
Step 900
900
#442B88
oklch(37.7% 0.147 289.9)
-
Step 950
950 (this color)
#281B50
oklch(27.2% 0.093 290.1)
#281B50 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) | #002652 | 0.055 |
| Deuteranopia (no green cones) | #00234F | 0.054 |
| Tritanopia (no blue cones) | #1C2732 | 0.075 |
| Achromatopsia (no color) | #252525 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #281B50
#281B50
oklch(27.2% 0.093 290.1)
- #292900
#292900
oklch(27.2% 0.059 109.8)
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 #281B50, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.045
- Oxford Blue #1B263B ΔE 0.059
- Dark Purple #35063E ΔE 0.059
- Midnight Blue #191970 ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.065
- Deep Purple #36013F ΔE 0.066
- Marine #042E60 ΔE 0.066
- Eggplant #380835 ΔE 0.070
Use #281B50 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.