#3B239E
Closest named color: Indigo Blue (#3A18B1). oklch(37.8% 0.184 282), rgb(59, 35, 158).
Aa
White text reads best on this color (10.93:1).
About this color
#3B239E is a dark, vivid purple. In OKLCH its lightness is 38%, its chroma 0.184 and its hue 282°. Its hue sits on the cool side of the wheel. The nearest named color is Indigo Blue (#3A18B1), ΔE 0.033 away. White text reads best on it, at 10.93:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Indigo Blue (#3A18B1) |
| Black text | 1.92:1 |
| White text | 10.93:1 |
Values
| HEX | #3B239E |
| RGB | rgb(59, 35, 158) |
| HSL | hsl(252, 64%, 38%) |
| OKLCH | oklch(37.8% 0.184 282) |
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 #3B239E | 10.93:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #3B239E | 1.92:1 | Fails | Lc 9.6 | Not readable |
| #3B239E text on white | 10.93:1 | AAA | Lc 94.3 | Preferred for body text |
| #3B239E text on black | 1.92:1 | Fails | Lc -8.2 | 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
#F4F5FF
oklch(97.2% 0.013 281.6)
-
Step 100
100
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D2D5FF
oklch(88.4% 0.058 281.9)
-
Step 300
300
#B6B9FF
oklch(80.9% 0.099 282.1)
-
Step 400
400
#9392FF
oklch(70.8% 0.157 282.1)
-
Step 500
500
#7B71FF
oklch(63.1% 0.204 282)
-
Step 600
600
#6749FF
oklch(55.6% 0.253 281.9)
-
Step 700
700
#5A11F9
oklch(49.1% 0.286 282)
-
Step 800
800
#491AC8
oklch(42.7% 0.235 282.3)
-
Step 900
900 (this color)
#3B239E
oklch(37.8% 0.184 282)
-
Step 950
950
#21175C
oklch(26.9% 0.117 281.8)
#3B239E 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) | #0041A1 | 0.075 |
| Deuteranopia (no green cones) | #00389C | 0.065 |
| Tritanopia (no blue cones) | #004760 | 0.150 |
| Achromatopsia (no color) | #3D3D3D | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B239E
#3B239E
oklch(37.8% 0.184 282)
- #4B4300
#4B4300
oklch(37.9% 0.079 101.7)
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 #3B239E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo Blue #3A18B1 ΔE 0.033
- Imperial Purple #480CA8 ΔE 0.034
- Sapphire #2138AB ΔE 0.054
- Chrysanthemum #560BAD ΔE 0.057
- Ultramarine #2000B1 ΔE 0.067
- Blueberry #464196 ΔE 0.070
- Dark Slate Blue #483D8B ΔE 0.070
- Indigo #4B0082 ΔE 0.074
Use #3B239E 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.