#3B237A
Closest named color: Indigo (#4B0082). oklch(34.3% 0.139 289.7), rgb(59, 35, 122).
Aa
White text reads best on this color (12.29:1).
About this color
#3B237A is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.139 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.052 away. White text reads best on it, at 12.29:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.70:1 |
| White text | 12.29:1 |
Values
| HEX | #3B237A |
| RGB | rgb(59, 35, 122) |
| HSL | hsl(257, 55%, 31%) |
| OKLCH | oklch(34.3% 0.139 289.7) |
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 #3B237A | 12.29:1 | AAA | Lc -101.0 | Preferred for body text |
| Black text on #3B237A | 1.70:1 | Fails | Lc 0.0 | Not readable |
| #3B237A text on white | 12.29:1 | AAA | Lc 97.5 | Preferred for body text |
| #3B237A text on black | 1.70:1 | 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E7FD
oklch(93.6% 0.03 290)
-
Step 200
200
#D8D3FE
oklch(88.5% 0.059 290.5)
-
Step 300
300
#BFB6FF
oklch(81% 0.102 289.6)
-
Step 400
400
#A08CFF
oklch(70.8% 0.164 289.5)
-
Step 500
500
#8C68FF
oklch(63.1% 0.214 289.8)
-
Step 600
600
#7849EE
oklch(55.6% 0.232 289.7)
-
Step 700
700
#6538CF
oklch(49% 0.216 289.6)
-
Step 800
800
#5231A7
oklch(42.7% 0.178 289.5)
-
Step 900
900 (this color)
#3B237A
oklch(34.3% 0.139 289.7)
-
Step 950
950
#271C4E
oklch(27.1% 0.088 289.3)
#3B237A 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) | #00367D | 0.074 |
| Deuteranopia (no green cones) | #003378 | 0.073 |
| Tritanopia (no blue cones) | #25394B | 0.113 |
| Achromatopsia (no color) | #353535 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B237A
#3B237A
oklch(34.3% 0.139 289.7)
- #3C3C00
#3C3C00
oklch(34.5% 0.075 109.8)
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 #3B237A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.052
- Royal Purple #4B006E ΔE 0.062
- Midnight Blue #191970 ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.073
- Imperial Purple #480CA8 ΔE 0.081
- Marine Blue #01386A ΔE 0.085
- Marine #042E60 ΔE 0.087
- Royal #0C1793 ΔE 0.087
Use #3B237A 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.