#2A1D51
Closest named color: Dark Indigo (#1F0954). oklch(27.9% 0.091 290.8), rgb(42, 29, 81).
Aa
White text reads best on this color (15.07:1).
About this color
#2A1D51 is a dark, moderately saturated purple. In OKLCH its lightness is 28%, its chroma 0.091 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Indigo (#1F0954), ΔE 0.051 away. White text reads best on it, at 15.07:1.
| Hue family | Purples |
| Lightness | dark (28%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.39:1 |
| White text | 15.07:1 |
Values
| HEX | #2A1D51 |
| RGB | rgb(42, 29, 81) |
| HSL | hsl(255, 47%, 22%) |
| OKLCH | oklch(27.9% 0.091 290.8) |
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 #2A1D51 | 15.07:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #2A1D51 | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #2A1D51 text on white | 15.07:1 | AAA | Lc 101.7 | Preferred for body text |
| #2A1D51 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
#E9E7FE
oklch(93.6% 0.031 289.8)
-
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
#7B45F1
oklch(55.6% 0.24 290.8)
-
Step 700
700
#6834D2
oklch(49.1% 0.223 290.7)
-
Step 800
800
#542EA9
oklch(42.7% 0.183 290.6)
-
Step 900
900
#452B86
oklch(37.6% 0.144 291)
-
Step 950
950 (this color)
#2A1D51
oklch(27.9% 0.091 290.8)
#2A1D51 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) | #002753 | 0.056 |
| Deuteranopia (no green cones) | #012550 | 0.055 |
| Tritanopia (no blue cones) | #1F2933 | 0.075 |
| Achromatopsia (no color) | #262626 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A1D51
#2A1D51
oklch(27.9% 0.091 290.8)
- #2A2B00
#2A2B00
oklch(27.9% 0.061 111.1)
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 #2A1D51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.051
- Oxford Blue #1B263B ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.060
- Dark Purple #35063E ΔE 0.062
- Marine #042E60 ΔE 0.064
- Midnight Blue #191970 ΔE 0.064
- Deep Purple #36013F ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.071
Use #2A1D51 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.