#3D3379
Closest named color: Dark Slate Blue (#483D8B). oklch(37.2% 0.115 285.9), rgb(61, 51, 121).
Aa
White text reads best on this color (10.78:1).
About this color
#3D3379 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.115 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.044 away. White text reads best on it, at 10.78:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.78:1 |
Values
| HEX | #3D3379 |
| RGB | rgb(61, 51, 121) |
| HSL | hsl(249, 41%, 34%) |
| OKLCH | oklch(37.2% 0.115 285.9) |
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 #3D3379 | 10.78:1 | AAA | Lc -98.7 | Preferred for body text |
| Black text on #3D3379 | 1.94:1 | Fails | Lc 9.2 | Not readable |
| #3D3379 text on white | 10.78:1 | AAA | Lc 94.7 | Preferred for body text |
| #3D3379 text on black | 1.94:1 | Fails | Lc -7.9 | 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
#F4F4FD
oklch(97% 0.012 286.2)
-
Step 100
100
#E8E8FA
oklch(93.6% 0.024 285.9)
-
Step 200
200
#D6D5F8
oklch(88.5% 0.048 286.7)
-
Step 300
300
#BBB9F6
oklch(80.9% 0.086 285.8)
-
Step 400
400
#9A92F2
oklch(70.7% 0.138 286.1)
-
Step 500
500
#8374ED
oklch(63.1% 0.176 285.9)
-
Step 600
600
#6E59DC
oklch(55.6% 0.192 285.7)
-
Step 700
700
#5D48BF
oklch(49.2% 0.178 285.9)
-
Step 800
800
#4B3C9A
oklch(42.7% 0.147 285.6)
-
Step 900
900 (this color)
#3D3379
oklch(37.2% 0.115 285.9)
-
Step 950
950
#241F48
oklch(26.9% 0.074 285.9)
#3D3379 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) | #093F7B | 0.061 |
| Deuteranopia (no green cones) | #073B77 | 0.061 |
| Tritanopia (no blue cones) | #294350 | 0.098 |
| Achromatopsia (no color) | #3D3D3D | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3379
#3D3379
oklch(37.2% 0.115 285.9)
- #464200
#464200
oklch(37.1% 0.079 105.8)
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 #3D3379, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.044
- Blueberry #464196 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.065
- Cobalt #1E488F ΔE 0.069
- Marine Blue #01386A ΔE 0.072
- Prussian Blue #1D3557 ΔE 0.078
- Indigo #4B0082 ΔE 0.082
- Light Navy #155084 ΔE 0.085
Use #3D3379 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.