#3F3276
Closest named color: Dark Slate Blue (#483D8B). oklch(37% 0.112 288.5), rgb(63, 50, 118).
Aa
White text reads best on this color (10.88:1).
About this color
#3F3276 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.112 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.047 away. White text reads best on it, at 10.88:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.92:1 |
| White text | 10.88:1 |
Values
| HEX | #3F3276 |
| RGB | rgb(63, 50, 118) |
| HSL | hsl(251, 40%, 33%) |
| OKLCH | oklch(37% 0.112 288.5) |
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 #3F3276 | 10.88:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #3F3276 | 1.92:1 | Fails | Lc 8.9 | Not readable |
| #3F3276 text on white | 10.88:1 | AAA | Lc 95.0 | Preferred for body text |
| #3F3276 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
#F5F4FD
oklch(97% 0.012 291.3)
-
Step 100
100
#E9E8FA
oklch(93.7% 0.024 288.5)
-
Step 200
200
#D7D5F7
oklch(88.5% 0.047 288.1)
-
Step 300
300
#BEB8F4
oklch(80.8% 0.084 288.9)
-
Step 400
400
#9E92EF
oklch(70.8% 0.134 288.4)
-
Step 500
500
#8873E9
oklch(63.1% 0.171 288.7)
-
Step 600
600
#7358D7
oklch(55.5% 0.186 288.6)
-
Step 700
700
#6147BB
oklch(49.1% 0.174 288.6)
-
Step 800
800
#4F3B97
oklch(42.6% 0.144 288.8)
-
Step 900
900 (this color)
#3F3276
oklch(37% 0.112 288.5)
-
Step 950
950
#261F46
oklch(27% 0.07 289.1)
#3F3276 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) | #0D3E78 | 0.063 |
| Deuteranopia (no green cones) | #0E3B75 | 0.061 |
| Tritanopia (no blue cones) | #2E414F | 0.092 |
| Achromatopsia (no color) | #3D3D3D | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3276
#3F3276
oklch(37% 0.112 288.5)
- #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 #3F3276, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.047
- Blueberry #464196 ΔE 0.065
- Twilight Blue #0A437A ΔE 0.069
- Marine Blue #01386A ΔE 0.073
- Cobalt #1E488F ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.077
- Indigo #4B0082 ΔE 0.081
- Royal Purple #4B006E ΔE 0.086
Use #3F3276 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.