#2B1B57
Closest named color: Dark Indigo (#1F0954). oklch(28.1% 0.103 290.5), rgb(43, 27, 87).
Aa
White text reads best on this color (15.03:1).
About this color
#2B1B57 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.103 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 0.047 away. White text reads best on it, at 15.03:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.103) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.39:1 |
| White text | 15.03:1 |
Values
| HEX | #2B1B57 |
| RGB | rgb(43, 27, 87) |
| HSL | hsl(256, 53%, 22%) |
| OKLCH | oklch(28.1% 0.103 290.5) |
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 #2B1B57 | 15.03:1 | AAA | Lc -104.4 | Preferred for body text |
| Black text on #2B1B57 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #2B1B57 text on white | 15.03:1 | AAA | Lc 101.6 | Preferred for body text |
| #2B1B57 text on black | 1.39:1 | 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
#E9E7FF
oklch(93.7% 0.032 289.6)
-
Step 200
200
#D8D3FF
oklch(88.5% 0.06 290.3)
-
Step 300
300
#C0B5FF
oklch(80.9% 0.104 290.7)
-
Step 400
400
#A28BFF
oklch(70.7% 0.166 290.7)
-
Step 500
500
#8E67FF
oklch(63.1% 0.216 290.7)
-
Step 600
600
#7D38FF
oklch(55.6% 0.267 290.7)
-
Step 700
700
#6A23E0
oklch(49% 0.252 290.5)
-
Step 800
800
#5622B5
oklch(42.7% 0.209 290.6)
-
Step 900
900
#46258F
oklch(37.7% 0.163 290.7)
-
Step 950
950 (this color)
#2B1B57
oklch(28.1% 0.103 290.5)
#2B1B57 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) | #002859 | 0.059 |
| Deuteranopia (no green cones) | #002556 | 0.058 |
| Tritanopia (no blue cones) | #1D2936 | 0.083 |
| Achromatopsia (no color) | #272727 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B1B57
#2B1B57
oklch(28.1% 0.103 290.5)
- #2B2C00
#2B2C00
oklch(28.3% 0.062 111.1)
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 #2B1B57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.047
- Midnight Blue #191970 ΔE 0.056
- Dark Purple #35063E ΔE 0.065
- Marine #042E60 ΔE 0.065
- Oxford Blue #1B263B ΔE 0.069
- Deep Purple #36013F ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.070
- Eggplant Purple #430541 ΔE 0.075
Use #2B1B57 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.