#3A257A
Closest named color: Indigo (#4B0082). oklch(34.5% 0.137 288.5), rgb(58, 37, 122).
Aa
White text reads best on this color (12.16:1).
About this color
#3A257A is a dark, moderately saturated purple. In OKLCH its lightness is 35%, its chroma 0.137 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.056 away. White text reads best on it, at 12.16:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.72:1 |
| White text | 12.16:1 |
Values
| HEX | #3A257A |
| RGB | rgb(58, 37, 122) |
| HSL | hsl(255, 53%, 31%) |
| OKLCH | oklch(34.5% 0.137 288.5) |
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 #3A257A | 12.16:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #3A257A | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #3A257A text on white | 12.16:1 | AAA | Lc 97.3 | Preferred for body text |
| #3A257A text on black | 1.72:1 | 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 900.
-
Step 50
50
#F5F4FE
oklch(97.1% 0.013 290.8)
-
Step 100
100
#E8E7FD
oklch(93.5% 0.03 287.9)
-
Step 200
200
#D7D4FD
oklch(88.5% 0.056 288.5)
-
Step 300
300
#BDB6FF
oklch(80.8% 0.102 288.3)
-
Step 400
400
#9E8DFF
oklch(70.8% 0.163 288.4)
-
Step 500
500
#896AFE
oklch(63.1% 0.211 288.5)
-
Step 600
600
#754CED
oklch(55.6% 0.228 288.4)
-
Step 700
700
#633BCE
oklch(49.1% 0.212 288.5)
-
Step 800
800
#5033A7
oklch(42.8% 0.175 288.1)
-
Step 900
900 (this color)
#3A257A
oklch(34.5% 0.137 288.5)
-
Step 950
950
#261C4D
oklch(26.9% 0.087 288.6)
#3A257A 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) | #00377D | 0.071 |
| Deuteranopia (no green cones) | #003378 | 0.069 |
| Tritanopia (no blue cones) | #233A4C | 0.111 |
| Achromatopsia (no color) | #363636 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A257A
#3A257A
oklch(34.5% 0.137 288.5)
- #3D3C00
#3D3C00
oklch(34.6% 0.075 108.7)
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 #3A257A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.056
- Royal Purple #4B006E ΔE 0.066
- Midnight Blue #191970 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.070
- Marine Blue #01386A ΔE 0.081
- Imperial Purple #480CA8 ΔE 0.082
- Marine #042E60 ΔE 0.084
- Blueberry #464196 ΔE 0.085
Use #3A257A 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.