#3D366D
Closest named color: Dark Slate Blue (#483D8B). oklch(36.9% 0.092 286.8), rgb(61, 54, 109).
Aa
White text reads best on this color (10.78:1).
About this color
#3D366D is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.092 and its hue 287°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 10.78:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.94:1 |
| White text | 10.78:1 |
Values
| HEX | #3D366D |
| RGB | rgb(61, 54, 109) |
| HSL | hsl(248, 34%, 32%) |
| OKLCH | oklch(36.9% 0.092 286.8) |
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 #3D366D | 10.78:1 | AAA | Lc -98.8 | Preferred for body text |
| Black text on #3D366D | 1.94:1 | Fails | Lc 9.1 | Not readable |
| #3D366D text on white | 10.78:1 | AAA | Lc 94.9 | Preferred for body text |
| #3D366D text on black | 1.94:1 | Fails | Lc -7.8 | 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
#E8E8F7
oklch(93.5% 0.02 286)
-
Step 200
200
#D7D6F2
oklch(88.6% 0.038 287.2)
-
Step 300
300
#BDBBEC
oklch(81% 0.069 286.6)
-
Step 400
400
#9C96E2
oklch(70.8% 0.11 286.8)
-
Step 500
500
#857ADA
oklch(63.2% 0.141 286.9)
-
Step 600
600
#6F61C7
oklch(55.6% 0.153 286.6)
-
Step 700
700
#5D4FAC
oklch(49% 0.143 286.8)
-
Step 800
800
#4C428B
oklch(42.7% 0.117 286.6)
-
Step 900
900 (this color)
#3D366D
oklch(36.9% 0.092 286.8)
-
Step 950
950
#252141
oklch(27% 0.058 287.5)
#3D366D 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) | #203F6F | 0.044 |
| Deuteranopia (no green cones) | #1F3C6C | 0.043 |
| Tritanopia (no blue cones) | #2F414C | 0.077 |
| Achromatopsia (no color) | #3D3D3D | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D366D
#3D366D
oklch(36.9% 0.092 286.8)
- #454200
#454200
oklch(37% 0.079 106.8)
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 #3D366D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Twilight Blue #0A437A ΔE 0.062
- Prussian Blue #1D3557 ΔE 0.063
- Marine Blue #01386A ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.068
- Blueberry #464196 ΔE 0.074
- Cobalt #1E488F ΔE 0.075
- Dark Blue Grey #1F3B4D ΔE 0.077
Use #3D366D 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.