#2B1B51
Closest named color: Dark Indigo (#1F0954). oklch(27.6% 0.094 292.8), rgb(43, 27, 81).
Aa
White text reads best on this color (15.23:1).
About this color
#2B1B51 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.094 and its hue 293°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.048 away. White text reads best on it, at 15.23:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.37:1 |
| White text | 15.23:1 |
Values
| HEX | #2B1B51 |
| RGB | rgb(43, 27, 81) |
| HSL | hsl(258, 50%, 21%) |
| OKLCH | oklch(27.6% 0.094 292.8) |
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 #2B1B51 | 15.23:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #2B1B51 | 1.37:1 | Fails | Lc 0.0 | Not readable |
| #2B1B51 text on white | 15.23:1 | AAA | Lc 101.9 | Preferred for body text |
| #2B1B51 text on black | 1.37:1 | 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
#EAE6FE
oklch(93.5% 0.032 293.4)
-
Step 200
200
#DAD2FF
oklch(88.5% 0.062 293.2)
-
Step 300
300
#C3B4FF
oklch(80.9% 0.105 293.1)
-
Step 400
400
#A689FF
oklch(70.7% 0.169 292.9)
-
Step 500
500
#9364FF
oklch(63.1% 0.22 293)
-
Step 600
600
#803FF3
oklch(55.6% 0.248 292.9)
-
Step 700
700
#6C2ED4
oklch(49% 0.231 292.6)
-
Step 800
800
#5829AB
oklch(42.7% 0.191 292.9)
-
Step 900
900
#482987
oklch(37.7% 0.148 293.1)
-
Step 950
950 (this color)
#2B1B51
oklch(27.6% 0.094 292.8)
#2B1B51 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) | #002653 | 0.060 |
| Deuteranopia (no green cones) | #002450 | 0.059 |
| Tritanopia (no blue cones) | #202733 | 0.075 |
| Achromatopsia (no color) | #252525 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B1B51
#2B1B51
oklch(27.6% 0.094 292.8)
- #282B00
#282B00
oklch(27.7% 0.062 113.8)
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 #2B1B51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.048
- Dark Purple #35063E ΔE 0.058
- Oxford Blue #1B263B ΔE 0.062
- Deep Purple #36013F ΔE 0.064
- Space Cadet #2B2D42 ΔE 0.065
- Midnight Blue #191970 ΔE 0.065
- Marine #042E60 ΔE 0.068
- Eggplant #380835 ΔE 0.069
Use #2B1B51 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.