#3D3666
Closest named color: Prussian Blue (#1D3557). oklch(36.4% 0.081 288.4), rgb(61, 54, 102).
Aa
White text reads best on this color (10.94:1).
About this color
#3D3666 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.081 and its hue 288°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.056 away. White text reads best on it, at 10.94:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.91:1 |
| White text | 10.94:1 |
Values
| HEX | #3D3666 |
| RGB | rgb(61, 54, 102) |
| HSL | hsl(249, 31%, 31%) |
| OKLCH | oklch(36.4% 0.081 288.4) |
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 #3D3666 | 10.94:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #3D3666 | 1.91:1 | Fails | Lc 8.7 | Not readable |
| #3D3666 text on white | 10.94:1 | AAA | Lc 95.2 | Preferred for body text |
| #3D3666 text on black | 1.91:1 | Fails | Lc -7.4 | 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
#F5F5FB
oklch(97.2% 0.008 286.3)
-
Step 100
100
#E9E8F5
oklch(93.6% 0.017 289.6)
-
Step 200
200
#D8D6EF
oklch(88.5% 0.034 289.4)
-
Step 300
300
#BEBBE6
oklch(80.9% 0.06 288.2)
-
Step 400
400
#9E97DA
oklch(70.8% 0.097 288.4)
-
Step 500
500
#877CD0
oklch(63.2% 0.124 288.3)
-
Step 600
600
#7163BD
oklch(55.5% 0.136 288.3)
-
Step 700
700
#5F52A3
oklch(49.1% 0.126 288.2)
-
Step 800
800
#4E4384
oklch(42.7% 0.105 288.9)
-
Step 900
900 (this color)
#3D3666
oklch(36.4% 0.081 288.4)
-
Step 950
950
#25223E
oklch(27% 0.051 287.4)
#3D3666 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) | #253E68 | 0.039 |
| Deuteranopia (no green cones) | #253B65 | 0.037 |
| Tritanopia (no blue cones) | #323F49 | 0.067 |
| Achromatopsia (no color) | #3C3C3C | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D3666
#3D3666
oklch(36.4% 0.081 288.4)
- #424100
#424100
oklch(36.4% 0.079 108.8)
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 #3D3666, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.062
- Marine Blue #01386A ΔE 0.065
- Twilight Blue #0A437A ΔE 0.066
- Dark Slate Blue #483D8B ΔE 0.067
- Dark Blue Grey #1F3B4D ΔE 0.067
- Charcoal #264653 ΔE 0.073
- Space Cadet #2B2D42 ΔE 0.074
Use #3D3666 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.