#3F2F82
Closest named color: Dark Slate Blue (#483D8B). oklch(37.4% 0.133 286.9), rgb(63, 47, 130).
Aa
White text reads best on this color (10.82:1).
About this color
#3F2F82 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.133 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 10.82:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.133) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.82:1 |
Values
| HEX | #3F2F82 |
| RGB | rgb(63, 47, 130) |
| HSL | hsl(252, 47%, 35%) |
| OKLCH | oklch(37.4% 0.133 286.9) |
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 #3F2F82 | 10.82:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #3F2F82 | 1.94:1 | Fails | Lc 9.2 | Not readable |
| #3F2F82 text on white | 10.82:1 | AAA | Lc 94.7 | Preferred for body text |
| #3F2F82 text on black | 1.94:1 | Fails | Lc -7.9 | 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
#E8E7FD
oklch(93.5% 0.03 287.9)
-
Step 200
200
#D6D4FD
oklch(88.5% 0.056 287.4)
-
Step 300
300
#BCB7FE
oklch(80.9% 0.1 287.2)
-
Step 400
400
#9B8EFE
oklch(70.7% 0.16 286.9)
-
Step 500
500
#866DFC
oklch(63.1% 0.204 287.1)
-
Step 600
600
#724FEB
oklch(55.6% 0.222 287.1)
-
Step 700
700
#603ECD
oklch(49.1% 0.207 287)
-
Step 800
800
#4E35A5
oklch(42.7% 0.17 287.1)
-
Step 900
900 (this color)
#3F2F82
oklch(37.4% 0.133 286.9)
-
Step 950
950
#251D4D
oklch(27% 0.085 286.9)
#3F2F82 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) | #003F85 | 0.070 |
| Deuteranopia (no green cones) | #003B80 | 0.069 |
| Tritanopia (no blue cones) | #274354 | 0.111 |
| Achromatopsia (no color) | #3D3D3D | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2F82
#3F2F82
oklch(37.4% 0.133 286.9)
- #464300
#464300
oklch(37.4% 0.08 106.8)
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 #3F2F82, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Blueberry #464196 ΔE 0.056
- Indigo #4B0082 ΔE 0.070
- Cobalt #1E488F ΔE 0.073
- Twilight Blue #0A437A ΔE 0.075
- Imperial Purple #480CA8 ΔE 0.077
- Sapphire #2138AB ΔE 0.080
- Rebecca Purple #663399 ΔE 0.083
Use #3F2F82 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.