#3A2571
Closest named color: Indigo (#4B0082). oklch(33.7% 0.124 290.9), rgb(58, 37, 113).
Aa
White text reads best on this color (12.47:1).
About this color
#3A2571 is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.124 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.062 away. White text reads best on it, at 12.47:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.124) |
| Temperature | in between |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.68:1 |
| White text | 12.47:1 |
Values
| HEX | #3A2571 |
| RGB | rgb(58, 37, 113) |
| HSL | hsl(257, 51%, 29%) |
| OKLCH | oklch(33.7% 0.124 290.9) |
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 #3A2571 | 12.47:1 | AAA | Lc -101.4 | Preferred for body text |
| Black text on #3A2571 | 1.68:1 | Fails | Lc 0.0 | Not readable |
| #3A2571 text on white | 12.47:1 | AAA | Lc 97.9 | Preferred for body text |
| #3A2571 text on black | 1.68:1 | 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E7FB
oklch(93.5% 0.027 290.5)
-
Step 200
200
#D8D4FA
oklch(88.5% 0.052 290.1)
-
Step 300
300
#C0B6F9
oklch(80.8% 0.094 291)
-
Step 400
400
#A28EF6
oklch(70.8% 0.149 290.9)
-
Step 500
500
#8D6DF2
oklch(63.1% 0.191 291)
-
Step 600
600
#7951E0
oklch(55.7% 0.206 291)
-
Step 700
700
#6640C3
oklch(49.1% 0.193 290.9)
-
Step 800
800
#53369E
oklch(42.8% 0.16 290.9)
-
Step 900
900 (this color)
#3A2571
oklch(33.7% 0.124 290.9)
-
Step 950
950
#271D49
oklch(26.9% 0.079 290.6)
#3A2571 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) | #003573 | 0.072 |
| Deuteranopia (no green cones) | #00326F | 0.071 |
| Tritanopia (no blue cones) | #293747 | 0.100 |
| Achromatopsia (no color) | #343434 | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A2571
#3A2571
oklch(33.7% 0.124 290.9)
- #393A00
#393A00
oklch(33.6% 0.074 110.9)
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 #3A2571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.062
- Royal Purple #4B006E ΔE 0.062
- Midnight Blue #191970 ΔE 0.068
- Marine #042E60 ΔE 0.077
- Marine Blue #01386A ΔE 0.078
- Dark Slate Blue #483D8B ΔE 0.078
- Prussian Blue #1D3557 ΔE 0.078
- Plum Purple #4E0550 ΔE 0.087
Use #3A2571 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.