#3E366B
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.089 288.2), rgb(62, 54, 107).
Aa
White text reads best on this color (10.79:1).
About this color
#3E366B is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.089 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.058 away. White text reads best on it, at 10.79:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.79:1 |
Values
| HEX | #3E366B |
| RGB | rgb(62, 54, 107) |
| HSL | hsl(249, 33%, 32%) |
| OKLCH | oklch(36.9% 0.089 288.2) |
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 #3E366B | 10.79:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #3E366B | 1.94:1 | Fails | Lc 9.0 | Not readable |
| #3E366B text on white | 10.79:1 | AAA | Lc 94.9 | Preferred for body text |
| #3E366B text on black | 1.94:1 | Fails | Lc -7.7 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F6
oklch(93.6% 0.019 289.3)
-
Step 200
200
#D7D6F1
oklch(88.5% 0.037 287.3)
-
Step 300
300
#BEBAEA
oklch(80.8% 0.067 288.6)
-
Step 400
400
#9D96DF
oklch(70.7% 0.106 287.8)
-
Step 500
500
#877AD6
oklch(63.1% 0.136 288.4)
-
Step 600
600
#7161C4
oklch(55.6% 0.149 288)
-
Step 700
700
#5F50A9
oklch(49.1% 0.137 288)
-
Step 800
800
#4E4289
oklch(42.8% 0.114 288.4)
-
Step 900
900 (this color)
#3E366B
oklch(36.9% 0.089 288.2)
-
Step 950
950
#252140
oklch(26.9% 0.057 287.9)
#3E366B 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) | #223F6D | 0.044 |
| Deuteranopia (no green cones) | #223C6A | 0.042 |
| Tritanopia (no blue cones) | #32414B | 0.075 |
| Achromatopsia (no color) | #3D3D3D | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3E366B
#3E366B
oklch(36.9% 0.089 288.2)
- #444200
#444200
oklch(36.9% 0.079 107.8)
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 #3E366B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.062
- Twilight Blue #0A437A ΔE 0.064
- Marine Blue #01386A ΔE 0.067
- Dark Grey Blue #29465B ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.075
- Blueberry #464196 ΔE 0.077
- Cobalt #1E488F ΔE 0.078
Use #3E366B 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.