#3F328B
Closest named color: Dark Slate Blue (#483D8B). oklch(38.6% 0.142 284.3), rgb(63, 50, 139).
Aa
White text reads best on this color (10.29:1).
About this color
#3F328B is a dark, vivid purple. In OKLCH its lightness is 39%, its chroma 0.142 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.033 away. White text reads best on it, at 10.29:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.04:1 |
| White text | 10.29:1 |
Values
| HEX | #3F328B |
| RGB | rgb(63, 50, 139) |
| HSL | hsl(249, 47%, 37%) |
| OKLCH | oklch(38.6% 0.142 284.3) |
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 #3F328B | 10.29:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #3F328B | 2.04:1 | Fails | Lc 10.5 | Not readable |
| #3F328B text on white | 10.29:1 | AAA | Lc 93.5 | Preferred for body text |
| #3F328B text on black | 2.04:1 | Fails | Lc -9.0 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E8FE
oklch(93.7% 0.03 283.7)
-
Step 200
200
#D4D5FF
oklch(88.6% 0.058 284.1)
-
Step 300
300
#B9B8FF
oklch(80.9% 0.1 284.6)
-
Step 400
400
#9790FF
oklch(70.8% 0.159 284.4)
-
Step 500
500
#806EFF
oklch(63% 0.207 284.4)
-
Step 600
600
#6C4DF4
oklch(55.6% 0.236 284.2)
-
Step 700
700
#5B3CD5
oklch(49.1% 0.219 284.2)
-
Step 800
800
#4A33AC
oklch(42.7% 0.182 284.3)
-
Step 900
900 (this color)
#3F328B
oklch(38.6% 0.142 284.3)
-
Step 950
950
#231D50
oklch(27.1% 0.09 284)
#3F328B 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) | #00438E | 0.067 |
| Deuteranopia (no green cones) | #003E89 | 0.065 |
| Tritanopia (no blue cones) | #1F4759 | 0.119 |
| Achromatopsia (no color) | #404040 | 0.142 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F328B
#3F328B
oklch(38.6% 0.142 284.3)
- #4B4600
#4B4600
oklch(38.7% 0.082 105)
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 #3F328B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.033
- Blueberry #464196 ΔE 0.043
- Cobalt #1E488F ΔE 0.064
- Sapphire #2138AB ΔE 0.066
- Imperial Purple #480CA8 ΔE 0.069
- Indigo Blue #3A18B1 ΔE 0.074
- Twilight Blue #0A437A ΔE 0.075
- Rebecca Purple #663399 ΔE 0.076
Use #3F328B 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.