#3D2F81
Closest named color: Dark Slate Blue (#483D8B). oklch(37.1% 0.132 285.8), rgb(61, 47, 129).
Aa
White text reads best on this color (10.92:1).
About this color
#3D2F81 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.132 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 10.92:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.92:1 |
| White text | 10.92:1 |
Values
| HEX | #3D2F81 |
| RGB | rgb(61, 47, 129) |
| HSL | hsl(250, 47%, 35%) |
| OKLCH | oklch(37.1% 0.132 285.8) |
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 #3D2F81 | 10.92:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #3D2F81 | 1.92:1 | Fails | Lc 9.0 | Not readable |
| #3D2F81 text on white | 10.92:1 | AAA | Lc 94.9 | Preferred for body text |
| #3D2F81 text on black | 1.92:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E8FD
oklch(93.7% 0.028 285.8)
-
Step 200
200
#D5D5FD
oklch(88.6% 0.055 285.2)
-
Step 300
300
#BAB8FE
oklch(80.9% 0.098 285.3)
-
Step 400
400
#998FFE
oklch(70.7% 0.159 285.7)
-
Step 500
500
#836EFC
oklch(63.1% 0.203 285.8)
-
Step 600
600
#6F51EB
oklch(55.6% 0.22 285.7)
-
Step 700
700
#5E40CC
oklch(49.1% 0.204 286)
-
Step 800
800
#4C36A5
oklch(42.7% 0.169 285.8)
-
Step 900
900 (this color)
#3D2F81
oklch(37.1% 0.132 285.8)
-
Step 950
950
#241E4D
oklch(27.1% 0.084 285.2)
#3D2F81 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) | #003F84 | 0.067 |
| Deuteranopia (no green cones) | #003A7F | 0.065 |
| Tritanopia (no blue cones) | #234253 | 0.110 |
| Achromatopsia (no color) | #3D3D3D | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D2F81
#3D2F81
oklch(37.1% 0.132 285.8)
- #464200
#464200
oklch(37.1% 0.079 105.8)
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 #3D2F81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Blueberry #464196 ΔE 0.058
- Indigo #4B0082 ΔE 0.071
- Cobalt #1E488F ΔE 0.072
- Twilight Blue #0A437A ΔE 0.073
- Imperial Purple #480CA8 ΔE 0.079
- Marine Blue #01386A ΔE 0.080
- Sapphire #2138AB ΔE 0.080
Use #3D2F81 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.