#3D3771
Closest named color: Dark Slate Blue (#483D8B). oklch(37.4% 0.097 285.4), rgb(61, 55, 113).
Aa
White text reads best on this color (10.58:1).
About this color
#3D3771 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.097 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.049 away. White text reads best on it, at 10.58:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.98:1 |
| White text | 10.58:1 |
Values
| HEX | #3D3771 |
| RGB | rgb(61, 55, 113) |
| HSL | hsl(246, 35%, 33%) |
| OKLCH | oklch(37.4% 0.097 285.4) |
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 #3D3771 | 10.58:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #3D3771 | 1.98:1 | Fails | Lc 9.5 | Not readable |
| #3D3771 text on white | 10.58:1 | AAA | Lc 94.4 | Preferred for body text |
| #3D3771 text on black | 1.98:1 | Fails | Lc -8.2 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E8E8F8
oklch(93.6% 0.022 286)
-
Step 200
200
#D6D6F3
oklch(88.5% 0.04 285.6)
-
Step 300
300
#BBBBEE
oklch(80.9% 0.072 284.7)
-
Step 400
400
#9A96E6
oklch(70.8% 0.116 285.3)
-
Step 500
500
#8279DE
oklch(63% 0.148 285.4)
-
Step 600
600
#6D60CC
oklch(55.6% 0.161 285.4)
-
Step 700
700
#5B4FB0
oklch(49.1% 0.149 285.1)
-
Step 800
800
#4B418F
oklch(42.8% 0.124 285.7)
-
Step 900
900 (this color)
#3D3771
oklch(37.4% 0.097 285.4)
-
Step 950
950
#242143
oklch(27% 0.062 285.5)
#3D3771 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) | #1F4073 | 0.044 |
| Deuteranopia (no green cones) | #1D3D70 | 0.044 |
| Tritanopia (no blue cones) | #2D434E | 0.082 |
| Achromatopsia (no color) | #3F3F3F | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3771
#3D3771
oklch(37.4% 0.097 285.4)
- #474300
#474300
oklch(37.5% 0.08 105.8)
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 #3D3771, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.049
- Twilight Blue #0A437A ΔE 0.059
- Marine Blue #01386A ΔE 0.066
- Blueberry #464196 ΔE 0.067
- Prussian Blue #1D3557 ΔE 0.067
- Cobalt #1E488F ΔE 0.070
- Dark Grey Blue #29465B ΔE 0.070
- Light Navy #155084 ΔE 0.079
Use #3D3771 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.