#3D3383
Closest named color: Dark Slate Blue (#483D8B). oklch(38% 0.129 284.1), rgb(61, 51, 131).
Aa
White text reads best on this color (10.50:1).
About this color
#3D3383 is a dark, moderately saturated purple. In OKLCH its lightness is 38%, its chroma 0.129 and its hue 284°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.035 away. White text reads best on it, at 10.50:1.
| Hue family | Purples |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.99:1 |
| White text | 10.50:1 |
Values
| HEX | #3D3383 |
| RGB | rgb(61, 51, 131) |
| HSL | hsl(248, 44%, 36%) |
| OKLCH | oklch(38% 0.129 284.1) |
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 #3D3383 | 10.50:1 | AAA | Lc -98.0 | Preferred for body text |
| Black text on #3D3383 | 1.99:1 | Fails | Lc 9.9 | Not readable |
| #3D3383 text on white | 10.50:1 | AAA | Lc 94.0 | Preferred for body text |
| #3D3383 text on black | 1.99:1 | Fails | Lc -8.5 | 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
#F4F4FE
oklch(97% 0.013 286.1)
-
Step 100
100
#E7E8FD
oklch(93.7% 0.028 283.7)
-
Step 200
200
#D4D5FC
oklch(88.5% 0.053 284.1)
-
Step 300
300
#B9B8FE
oklch(80.9% 0.098 284.6)
-
Step 400
400
#9691FD
oklch(70.8% 0.155 283.8)
-
Step 500
500
#7F71FA
oklch(63.1% 0.197 283.8)
-
Step 600
600
#6B54EA
oklch(55.7% 0.216 283.9)
-
Step 700
700
#5A43CB
oklch(49.1% 0.2 284)
-
Step 800
800
#4938A4
oklch(42.6% 0.166 284)
-
Step 900
900 (this color)
#3D3383
oklch(38% 0.129 284.1)
-
Step 950
950
#231E4C
oklch(26.9% 0.082 284.4)
#3D3383 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) | #004286 | 0.064 |
| Deuteranopia (no green cones) | #003D81 | 0.062 |
| Tritanopia (no blue cones) | #214656 | 0.109 |
| Achromatopsia (no color) | #3F3F3F | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3383
#3D3383
oklch(38% 0.129 284.1)
- #4A4400
#4A4400
oklch(38.1% 0.08 103.8)
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 #3D3383, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.035
- Blueberry #464196 ΔE 0.049
- Cobalt #1E488F ΔE 0.063
- Twilight Blue #0A437A ΔE 0.067
- Sapphire #2138AB ΔE 0.075
- Marine Blue #01386A ΔE 0.079
- Indigo #4B0082 ΔE 0.080
- Imperial Purple #480CA8 ΔE 0.081
Use #3D3383 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.