#3F396F
Closest named color: Dark Slate Blue (#483D8B). oklch(37.9% 0.09 286.3), rgb(63, 57, 111).
Aa
White text reads best on this color (10.36:1).
About this color
#3F396F is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.090 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 10.36:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.02:1 |
| White text | 10.36:1 |
Values
| HEX | #3F396F |
| RGB | rgb(63, 57, 111) |
| HSL | hsl(247, 32%, 33%) |
| OKLCH | oklch(37.9% 0.09 286.3) |
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 #3F396F | 10.36:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #3F396F | 2.02:1 | Fails | Lc 10.0 | Not readable |
| #3F396F text on white | 10.36:1 | AAA | Lc 93.9 | Preferred for body text |
| #3F396F text on black | 2.02:1 | Fails | Lc -8.6 | 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
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D6D6F1
oklch(88.4% 0.037 285.6)
-
Step 300
300
#BCBBEB
oklch(80.9% 0.067 285.7)
-
Step 400
400
#9B96E1
oklch(70.7% 0.109 286.3)
-
Step 500
500
#847BD8
oklch(63.2% 0.137 286.2)
-
Step 600
600
#6F62C6
oklch(55.7% 0.15 286.4)
-
Step 700
700
#5D50AB
oklch(49.1% 0.14 286.6)
-
Step 800
800
#4C428A
oklch(42.7% 0.115 286.8)
-
Step 900
900 (this color)
#3F396F
oklch(37.9% 0.09 286.3)
-
Step 950
950
#252141
oklch(27% 0.058 287.5)
#3F396F 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) | #254171 | 0.040 |
| Deuteranopia (no green cones) | #243F6E | 0.040 |
| Tritanopia (no blue cones) | #31444E | 0.077 |
| Achromatopsia (no color) | #404040 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F396F
#3F396F
oklch(37.9% 0.09 286.3)
- #484400
#484400
oklch(37.8% 0.081 105.9)
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 #3F396F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Twilight Blue #0A437A ΔE 0.060
- Dark Grey Blue #29465B ΔE 0.065
- Blueberry #464196 ΔE 0.068
- Prussian Blue #1D3557 ΔE 0.068
- Marine Blue #01386A ΔE 0.069
- Cobalt #1E488F ΔE 0.070
- Light Navy #155084 ΔE 0.077
Use #3F396F 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.