#3D306B
Closest named color: Prussian Blue (#1D3557). oklch(35.6% 0.099 290.6), rgb(61, 48, 107).
Aa
White text reads best on this color (11.45:1).
About this color
#3D306B is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.099 and its hue 291°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.063 away. White text reads best on it, at 11.45:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.83:1 |
| White text | 11.45:1 |
Values
| HEX | #3D306B |
| RGB | rgb(61, 48, 107) |
| HSL | hsl(253, 38%, 30%) |
| OKLCH | oklch(35.6% 0.099 290.6) |
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 #3D306B | 11.45:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #3D306B | 1.83:1 | Fails | Lc 7.7 | Not readable |
| #3D306B text on white | 11.45:1 | AAA | Lc 96.2 | Preferred for body text |
| #3D306B text on black | 1.83:1 | Fails | Lc 0.0 | 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
#F5F4FC
oklch(97% 0.011 292)
-
Step 100
100
#E9E8F8
oklch(93.6% 0.021 288.9)
-
Step 200
200
#D8D5F3
oklch(88.5% 0.041 290.1)
-
Step 300
300
#C0B9EE
oklch(81% 0.074 290.7)
-
Step 400
400
#A093E5
oklch(70.7% 0.118 290.3)
-
Step 500
500
#8B76DD
oklch(63.1% 0.151 290.8)
-
Step 600
600
#765CCB
oklch(55.6% 0.165 290.8)
-
Step 700
700
#634BAF
oklch(49% 0.153 290.7)
-
Step 800
800
#513E8E
oklch(42.7% 0.127 291)
-
Step 900
900 (this color)
#3D306B
oklch(35.6% 0.099 290.6)
-
Step 950
950
#272042
oklch(27% 0.062 291.2)
#3D306B 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) | #163B6D | 0.057 |
| Deuteranopia (no green cones) | #18386A | 0.054 |
| Tritanopia (no blue cones) | #303C48 | 0.081 |
| Achromatopsia (no color) | #3A3A3A | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3D306B
#3D306B
oklch(35.6% 0.099 290.6)
- #3E3F00
#3E3F00
oklch(35.5% 0.078 110.8)
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 #3D306B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.063
- Dark Slate Blue #483D8B ΔE 0.065
- Marine Blue #01386A ΔE 0.068
- Twilight Blue #0A437A ΔE 0.072
- Marine #042E60 ΔE 0.076
- Space Cadet #2B2D42 ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.080
- Dark Blue Grey #1F3B4D ΔE 0.081
Use #3D306B 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.