#3F2F76
Closest named color: Dark Slate Blue (#483D8B). oklch(36.4% 0.116 289.7), rgb(63, 47, 118).
Aa
White text reads best on this color (11.17:1).
About this color
#3F2F76 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.116 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 11.17:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #3F2F76 |
| RGB | rgb(63, 47, 118) |
| HSL | hsl(254, 43%, 32%) |
| OKLCH | oklch(36.4% 0.116 289.7) |
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 #3F2F76 | 11.17:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #3F2F76 | 1.87:1 | Fails | Lc 8.4 | Not readable |
| #3F2F76 text on white | 11.17:1 | AAA | Lc 95.5 | Preferred for body text |
| #3F2F76 text on black | 1.87:1 | Fails | Lc 0.0 | 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
#E9E7FA
oklch(93.5% 0.026 290.7)
-
Step 200
200
#D8D4F8
oklch(88.4% 0.049 290.4)
-
Step 300
300
#BFB8F6
oklch(81% 0.087 289.5)
-
Step 400
400
#A090F1
oklch(70.7% 0.139 289.9)
-
Step 500
500
#8A71EC
oklch(63.1% 0.178 289.7)
-
Step 600
600
#7655DB
oklch(55.6% 0.195 289.9)
-
Step 700
700
#6345BE
oklch(49.2% 0.18 289.5)
-
Step 800
800
#513999
oklch(42.6% 0.15 290.1)
-
Step 900
900 (this color)
#3F2F76
oklch(36.4% 0.116 289.7)
-
Step 950
950
#271E47
oklch(26.9% 0.074 290.7)
#3F2F76 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) | #013D78 | 0.071 |
| Deuteranopia (no green cones) | #053A74 | 0.069 |
| Tritanopia (no blue cones) | #2E3F4D | 0.097 |
| Achromatopsia (no color) | #3B3B3B | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2F76
#3F2F76
oklch(36.4% 0.116 289.7)
- #414100
#414100
oklch(36.3% 0.079 109.8)
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 #3F2F76, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.069
- Twilight Blue #0A437A ΔE 0.074
- Indigo #4B0082 ΔE 0.074
- Marine Blue #01386A ΔE 0.075
- Prussian Blue #1D3557 ΔE 0.078
- Royal Purple #4B006E ΔE 0.079
- Cobalt #1E488F ΔE 0.080
Use #3F2F76 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.