#3F3968
Closest named color: Dark Grey Blue (#29465B). oklch(37.4% 0.079 287.8), rgb(63, 57, 104).
Aa
White text reads best on this color (10.51:1).
About this color
#3F3968 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.079 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.058 away. White text reads best on it, at 10.51:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.99:1 |
| White text | 10.51:1 |
Values
| HEX | #3F3968 |
| RGB | rgb(63, 57, 104) |
| HSL | hsl(248, 29%, 32%) |
| OKLCH | oklch(37.4% 0.079 287.8) |
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 #3F3968 | 10.51:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #3F3968 | 1.99:1 | Fails | Lc 9.6 | Not readable |
| #3F3968 text on white | 10.51:1 | AAA | Lc 94.3 | Preferred for body text |
| #3F3968 text on black | 1.99:1 | Fails | Lc -8.3 | 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
#E9E8F5
oklch(93.6% 0.017 289.6)
-
Step 200
200
#D7D6EE
oklch(88.4% 0.033 287.6)
-
Step 300
300
#BEBBE6
oklch(80.9% 0.06 288.2)
-
Step 400
400
#9D97D9
oklch(70.6% 0.096 287.9)
-
Step 500
500
#867CCE
oklch(63% 0.121 288)
-
Step 600
600
#7164BB
oklch(55.6% 0.132 288.2)
-
Step 700
700
#5E53A1
oklch(49.1% 0.121 287.5)
-
Step 800
800
#4D4483
oklch(42.7% 0.102 287.8)
-
Step 900
900 (this color)
#3F3968
oklch(37.4% 0.079 287.8)
-
Step 950
950
#25223D
oklch(26.9% 0.05 287.7)
#3F3968 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) | #29406A | 0.036 |
| Deuteranopia (no green cones) | #293E67 | 0.034 |
| Tritanopia (no blue cones) | #34424B | 0.067 |
| Achromatopsia (no color) | #3F3F3F | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3968
#3F3968
oklch(37.4% 0.079 287.8)
- #454302
#454302
oklch(37.3% 0.079 107.7)
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 #3F3968, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.058
- Dark Slate Blue #483D8B ΔE 0.061
- Prussian Blue #1D3557 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.063
- Marine Blue #01386A ΔE 0.068
- Dark Blue Grey #1F3B4D ΔE 0.070
- Charcoal #264653 ΔE 0.070
- Onyx #343A40 ΔE 0.075
Use #3F3968 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.