#2A1855
Closest named color: Dark Indigo (#1F0954). oklch(27.3% 0.105 291.5), rgb(42, 24, 85).
Aa
White text reads best on this color (15.43:1).
About this color
#2A1855 is a dark, moderately saturated purple. In OKLCH its lightness is 27%, its chroma 0.105 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 0.040 away. White text reads best on it, at 15.43:1.
| Hue family | Purples |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.105) |
| Temperature | in between |
| Nearest name | Dark Indigo (#1F0954) |
| Black text | 1.36:1 |
| White text | 15.43:1 |
Values
| HEX | #2A1855 |
| RGB | rgb(42, 24, 85) |
| HSL | hsl(258, 56%, 21%) |
| OKLCH | oklch(27.3% 0.105 291.5) |
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 #2A1855 | 15.43:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #2A1855 | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #2A1855 text on white | 15.43:1 | AAA | Lc 102.0 | Preferred for body text |
| #2A1855 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
#EAE6FF
oklch(93.6% 0.034 293.1)
-
Step 200
200
#D9D3FF
oklch(88.6% 0.06 291.4)
-
Step 300
300
#C1B5FF
oklch(81% 0.104 291.3)
-
Step 400
400
#A38AFF
oklch(70.7% 0.167 291.4)
-
Step 500
500
#9066FF
oklch(63.1% 0.217 291.6)
-
Step 600
600
#7F36FF
oklch(55.6% 0.268 291.5)
-
Step 700
700
#6C1EE1
oklch(49% 0.256 291.4)
-
Step 800
800
#581FB6
oklch(42.7% 0.212 291.6)
-
Step 900
900
#472490
oklch(37.7% 0.165 291.2)
-
Step 950
950 (this color)
#2A1855
oklch(27.3% 0.105 291.5)
#2A1855 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) | #002557 | 0.060 |
| Deuteranopia (no green cones) | #002354 | 0.059 |
| Tritanopia (no blue cones) | #1D2734 | 0.084 |
| Achromatopsia (no color) | #242424 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A1855
#2A1855
oklch(27.3% 0.105 291.5)
- #282A00
#282A00
oklch(27.4% 0.061 112.5)
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 #2A1855, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Indigo #1F0954 ΔE 0.040
- Midnight Blue #191970 ΔE 0.058
- Dark Purple #35063E ΔE 0.060
- Deep Purple #36013F ΔE 0.064
- Oxford Blue #1B263B ΔE 0.071
- Marine #042E60 ΔE 0.071
- Eggplant Purple #430541 ΔE 0.073
- Eggplant #380835 ΔE 0.073
Use #2A1855 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.