#3F3676
Closest named color: Dark Slate Blue (#483D8B). oklch(37.7% 0.106 286.6), rgb(63, 54, 118).
Aa
White text reads best on this color (10.49:1).
About this color
#3F3676 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.106 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 10.49:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.49:1 |
Values
| HEX | #3F3676 |
| RGB | rgb(63, 54, 118) |
| HSL | hsl(248, 37%, 34%) |
| OKLCH | oklch(37.7% 0.106 286.6) |
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 #3F3676 | 10.49:1 | AAA | Lc -98.2 | Preferred for body text |
| Black text on #3F3676 | 2.00:1 | Fails | Lc 9.8 | Not readable |
| #3F3676 text on white | 10.49:1 | AAA | Lc 94.2 | Preferred for body text |
| #3F3676 text on black | 2.00:1 | Fails | Lc -8.4 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D5F6
oklch(88.4% 0.045 286.8)
-
Step 300
300
#BCBAF2
oklch(81% 0.079 286.1)
-
Step 400
400
#9B94EB
oklch(70.8% 0.125 286.4)
-
Step 500
500
#8476E5
oklch(63% 0.162 286.5)
-
Step 600
600
#6F5CD3
oklch(55.5% 0.176 286.5)
-
Step 700
700
#5E4BB7
oklch(49.2% 0.164 286.8)
-
Step 800
800
#4C3E94
oklch(42.7% 0.136 286.6)
-
Step 900
900 (this color)
#3F3676
oklch(37.7% 0.106 286.6)
-
Step 950
950
#252045
oklch(27% 0.067 287.2)
#3F3676 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) | #184178 | 0.054 |
| Deuteranopia (no green cones) | #173D75 | 0.053 |
| Tritanopia (no blue cones) | #2E4450 | 0.090 |
| Achromatopsia (no color) | #3F3F3F | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3676
#3F3676
oklch(37.7% 0.106 286.6)
- #474400
#474400
oklch(37.7% 0.081 106.8)
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 #3F3676, 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 0.060
- Twilight Blue #0A437A ΔE 0.062
- Cobalt #1E488F ΔE 0.068
- Marine Blue #01386A ΔE 0.072
- Prussian Blue #1D3557 ΔE 0.076
- Dark Grey Blue #29465B ΔE 0.079
- Light Navy #155084 ΔE 0.080
Use #3F3676 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.