#3D3391
Closest named color: Dark Slate Blue (#483D8B). oklch(39.1% 0.149 281.9), rgb(61, 51, 145).
Aa
White text reads best on this color (10.09:1).
About this color
#3D3391 is a dark, vivid purple. In OKLCH its lightness is 39%, its chroma 0.149 and its hue 282°. 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 10.09:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.08:1 |
| White text | 10.09:1 |
Values
| HEX | #3D3391 |
| RGB | rgb(61, 51, 145) |
| HSL | hsl(246, 48%, 38%) |
| OKLCH | oklch(39.1% 0.149 281.9) |
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 #3D3391 | 10.09:1 | AAA | Lc -97.1 | Preferred for body text |
| Black text on #3D3391 | 2.08:1 | Fails | Lc 11.0 | Not readable |
| #3D3391 text on white | 10.09:1 | AAA | Lc 93.0 | Preferred for body text |
| #3D3391 text on black | 2.08:1 | Fails | Lc -9.5 | 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
#F4F5FF
oklch(97.2% 0.013 281.6)
-
Step 100
100
#E6E8FF
oklch(93.6% 0.031 281.8)
-
Step 200
200
#D2D5FF
oklch(88.4% 0.058 281.9)
-
Step 300
300
#B6B9FF
oklch(80.9% 0.099 282.1)
-
Step 400
400
#9292FF
oklch(70.8% 0.157 281.6)
-
Step 500
500
#7B71FF
oklch(63.1% 0.204 282)
-
Step 600
600
#674BFC
oklch(55.6% 0.248 281.9)
-
Step 700
700
#563ADC
oklch(49.1% 0.23 281.7)
-
Step 800
800
#4632B2
oklch(42.8% 0.191 281.8)
-
Step 900
900 (this color)
#3D3391
oklch(39.1% 0.149 281.9)
-
Step 950
950
#211D52
oklch(27% 0.093 281.5)
#3D3391 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) | #004594 | 0.064 |
| Deuteranopia (no green cones) | #003E8F | 0.060 |
| Tritanopia (no blue cones) | #114A5D | 0.126 |
| Achromatopsia (no color) | #424242 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3391
#3D3391
oklch(39.1% 0.149 281.9)
- #4F4600
#4F4600
oklch(39.1% 0.082 101)
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 #3D3391, 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 0.039
- Sapphire #2138AB ΔE 0.056
- Cobalt #1E488F ΔE 0.060
- Imperial Purple #480CA8 ΔE 0.065
- Indigo Blue #3A18B1 ΔE 0.066
- Twilight Blue #0A437A ΔE 0.076
- Rebecca Purple #663399 ΔE 0.076
Use #3D3391 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.