#3F3382
Closest named color: Dark Slate Blue (#483D8B). oklch(38.1% 0.128 285.6), rgb(63, 51, 130).
Aa
White text reads best on this color (10.46:1).
About this color
#3F3382 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.128 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.034 away. White text reads best on it, at 10.46:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.00:1 |
| White text | 10.46:1 |
Values
| HEX | #3F3382 |
| RGB | rgb(63, 51, 130) |
| HSL | hsl(249, 44%, 35%) |
| OKLCH | oklch(38.1% 0.128 285.6) |
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 #3F3382 | 10.46:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #3F3382 | 2.00:1 | Fails | Lc 10.0 | Not readable |
| #3F3382 text on white | 10.46:1 | AAA | Lc 94.0 | Preferred for body text |
| #3F3382 text on black | 2.00:1 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E8E8FC
oklch(93.7% 0.027 285.9)
-
Step 200
200
#D5D5FC
oklch(88.5% 0.053 285.3)
-
Step 300
300
#BAB8FC
oklch(80.9% 0.095 285.4)
-
Step 400
400
#9990FB
oklch(70.7% 0.153 285.6)
-
Step 500
500
#8370F8
oklch(63.1% 0.195 285.7)
-
Step 600
600
#6E53E7
oklch(55.5% 0.213 285.5)
-
Step 700
700
#5D42C9
oklch(49.1% 0.198 285.7)
-
Step 800
800
#4B38A2
oklch(42.7% 0.163 285.4)
-
Step 900
900 (this color)
#3F3382
oklch(38.1% 0.128 285.6)
-
Step 950
950
#241E4B
oklch(26.9% 0.08 285.8)
#3F3382 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) | #004285 | 0.067 |
| Deuteranopia (no green cones) | #003D80 | 0.066 |
| Tritanopia (no blue cones) | #274555 | 0.107 |
| Achromatopsia (no color) | #3F3F3F | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3382
#3F3382
oklch(38.1% 0.128 285.6)
- #494500
#494500
oklch(38.2% 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 #3F3382, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.034
- Blueberry #464196 ΔE 0.049
- Cobalt #1E488F ΔE 0.065
- Twilight Blue #0A437A ΔE 0.069
- Sapphire #2138AB ΔE 0.078
- Indigo #4B0082 ΔE 0.079
- Rebecca Purple #663399 ΔE 0.081
- Marine Blue #01386A ΔE 0.081
Use #3F3382 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.