#3D3573
Closest named color: Dark Slate Blue (#483D8B). oklch(37.1% 0.103 286.2), rgb(61, 53, 115).
Aa
White text reads best on this color (10.74:1).
About this color
#3D3573 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.103 and its hue 286°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.048 away. White text reads best on it, at 10.74:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.74:1 |
Values
| HEX | #3D3573 |
| RGB | rgb(61, 53, 115) |
| HSL | hsl(248, 37%, 33%) |
| OKLCH | oklch(37.1% 0.103 286.2) |
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 #3D3573 | 10.74:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #3D3573 | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #3D3573 text on white | 10.74:1 | AAA | Lc 94.7 | Preferred for body text |
| #3D3573 text on black | 1.95:1 | 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
#F5F5FC
oklch(97.2% 0.009 286.2)
-
Step 100
100
#E8E8F9
oklch(93.6% 0.023 286)
-
Step 200
200
#D6D6F5
oklch(88.6% 0.042 285.5)
-
Step 300
300
#BCBAF1
oklch(80.9% 0.077 286.2)
-
Step 400
400
#9B94EA
oklch(70.7% 0.124 286.5)
-
Step 500
500
#8477E3
oklch(63.1% 0.158 286.5)
-
Step 600
600
#6E5DD1
oklch(55.5% 0.172 286.1)
-
Step 700
700
#5D4CB5
oklch(49.1% 0.16 286.4)
-
Step 800
800
#4B3F92
oklch(42.6% 0.132 286)
-
Step 900
900 (this color)
#3D3573
oklch(37.1% 0.103 286.2)
-
Step 950
950
#242044
oklch(26.8% 0.065 286.2)
#3D3573 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) | #193F75 | 0.050 |
| Deuteranopia (no green cones) | #173C72 | 0.051 |
| Tritanopia (no blue cones) | #2C424E | 0.087 |
| Achromatopsia (no color) | #3E3E3E | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3573
#3D3573
oklch(37.1% 0.103 286.2)
- #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 #3D3573, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.048
- Twilight Blue #0A437A ΔE 0.062
- Blueberry #464196 ΔE 0.066
- Marine Blue #01386A ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.070
- Cobalt #1E488F ΔE 0.071
- Dark Grey Blue #29465B ΔE 0.077
- Light Navy #155084 ΔE 0.083
Use #3D3573 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.