#3E3371
Closest named color: Dark Slate Blue (#483D8B). oklch(36.7% 0.103 288.4), rgb(62, 51, 113).
Aa
White text reads best on this color (10.95:1).
About this color
#3E3371 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.103 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.053 away. White text reads best on it, at 10.95:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #3E3371 |
| RGB | rgb(62, 51, 113) |
| HSL | hsl(251, 38%, 32%) |
| OKLCH | oklch(36.7% 0.103 288.4) |
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 #3E3371 | 10.95:1 | AAA | Lc -99.0 | Preferred for body text |
| Black text on #3E3371 | 1.91:1 | Fails | Lc 8.7 | Not readable |
| #3E3371 text on white | 10.95:1 | AAA | Lc 95.2 | Preferred for body text |
| #3E3371 text on black | 1.91:1 | Fails | Lc -7.5 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D7D5F5
oklch(88.5% 0.044 288.3)
-
Step 300
300
#BEB9F0
oklch(80.9% 0.077 288.7)
-
Step 400
400
#9E93E9
oklch(70.7% 0.124 288.7)
-
Step 500
500
#8776E2
oklch(63.1% 0.158 288.2)
-
Step 600
600
#725CD0
oklch(55.6% 0.172 288.2)
-
Step 700
700
#604BB4
oklch(49.1% 0.16 288.3)
-
Step 800
800
#4E3E92
oklch(42.7% 0.133 288.2)
-
Step 900
900 (this color)
#3E3371
oklch(36.7% 0.103 288.4)
-
Step 950
950
#262044
oklch(27% 0.065 288.9)
#3E3371 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) | #173E73 | 0.055 |
| Deuteranopia (no green cones) | #173B70 | 0.054 |
| Tritanopia (no blue cones) | #2F404D | 0.085 |
| Achromatopsia (no color) | #3C3C3C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E3371
#3E3371
oklch(36.7% 0.103 288.4)
- #434200
#434200
oklch(36.8% 0.08 108.8)
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 #3E3371, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.053
- Twilight Blue #0A437A ΔE 0.066
- Marine Blue #01386A ΔE 0.069
- Prussian Blue #1D3557 ΔE 0.069
- Blueberry #464196 ΔE 0.071
- Cobalt #1E488F ΔE 0.077
- Dark Grey Blue #29465B ΔE 0.079
- Marine #042E60 ΔE 0.082
Use #3E3371 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.