#3F3C85
Closest named color: Dark Slate Blue (#483D8B). oklch(40% 0.119 281.4), rgb(63, 60, 133).
Aa
White text reads best on this color (9.56:1).
About this color
#3F3C85 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.119 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.018 away. White text reads best on it, at 9.56:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.56:1 |
Values
| HEX | #3F3C85 |
| RGB | rgb(63, 60, 133) |
| HSL | hsl(242, 38%, 38%) |
| OKLCH | oklch(40% 0.119 281.4) |
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 #3F3C85 | 9.56:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #3F3C85 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #3F3C85 text on white | 9.56:1 | AAA | Lc 91.9 | Preferred for body text |
| #3F3C85 text on black | 2.19:1 | Fails | Lc -10.5 | 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
#F4F5FE
oklch(97.2% 0.012 281.1)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D3D6FA
oklch(88.5% 0.05 281.6)
-
Step 300
300
#B6BAF9
oklch(80.8% 0.089 281.4)
-
Step 400
400
#9294F7
oklch(70.7% 0.143 281.2)
-
Step 500
500
#7A76F3
oklch(63.1% 0.182 281.3)
-
Step 600
600
#655BE2
oklch(55.7% 0.198 281.2)
-
Step 700
700
#5549C4
oklch(49.1% 0.184 281.6)
-
Step 800
800
#453D9E
oklch(42.7% 0.152 281.5)
-
Step 900
900 (this color)
#3F3C85
oklch(40% 0.119 281.4)
-
Step 950
950
#21204A
oklch(27% 0.076 281.1)
#3F3C85 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) | #144888 | 0.053 |
| Deuteranopia (no green cones) | #0C4383 | 0.054 |
| Tritanopia (no blue cones) | #234C5A | 0.102 |
| Achromatopsia (no color) | #454545 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3C85
#3F3C85
oklch(40% 0.119 281.4)
- #514900
#514900
oklch(40.1% 0.084 102.3)
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 #3F3C85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.018
- Blueberry #464196 ΔE 0.033
- Cobalt #1E488F ΔE 0.048
- Twilight Blue #0A437A ΔE 0.060
- Twilight #4E518B ΔE 0.065
- Dusk Blue #26538D ΔE 0.066
- Light Navy #155084 ΔE 0.066
- Sapphire #2138AB ΔE 0.075
Use #3F3C85 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.