#3F2B5E
Closest named color: Prussian Blue (#1D3557). oklch(33.9% 0.088 299.8), rgb(63, 43, 94).
Aa
White text reads best on this color (12.21:1).
About this color
#3F2B5E is a dark, moderately saturated purple. In OKLCH its lightness is 34%, its chroma 0.088 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.061 away. White text reads best on it, at 12.21:1.
| Hue family | Purples |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.088) |
| Temperature | in between |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.71:1 |
| White text | 12.21:1 |
Values
| HEX | #3F2B5E |
| RGB | rgb(63, 43, 94) |
| HSL | hsl(264, 37%, 27%) |
| OKLCH | oklch(33.9% 0.088 299.8) |
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 #3F2B5E | 12.21:1 | AAA | Lc -101.2 | Preferred for body text |
| Black text on #3F2B5E | 1.71:1 | Fails | Lc 0.0 | Not readable |
| #3F2B5E text on white | 12.21:1 | AAA | Lc 97.7 | Preferred for body text |
| #3F2B5E text on black | 1.71:1 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F5
oklch(93.5% 0.019 299.1)
-
Step 200
200
#DCD4EF
oklch(88.5% 0.038 299.2)
-
Step 300
300
#C7B8E6
oklch(81% 0.066 299.8)
-
Step 400
400
#AA91D9
oklch(70.6% 0.106 299.6)
-
Step 500
500
#9674CF
oklch(63% 0.137 299.7)
-
Step 600
600
#815BBC
oklch(55.5% 0.148 299.7)
-
Step 700
700
#6D4BA2
oklch(49.1% 0.136 299.4)
-
Step 800
800
#593E83
oklch(42.8% 0.113 299.7)
-
Step 900
900 (this color)
#3F2B5E
oklch(33.9% 0.088 299.8)
-
Step 950
950
#2B1F3E
oklch(27% 0.058 300.4)
#3F2B5E 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) | #1A3560 | 0.060 |
| Deuteranopia (no green cones) | #1F355D | 0.056 |
| Tritanopia (no blue cones) | #393540 | 0.069 |
| Achromatopsia (no color) | #353535 | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2B5E
#3F2B5E
oklch(33.9% 0.088 299.8)
- #333D00
#333D00
oklch(33.9% 0.08 119.5)
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 #3F2B5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.064
- Gunmetal #293241 ΔE 0.072
- Grape Purple #5D1451 ΔE 0.076
- Plum Purple #4E0550 ΔE 0.077
- Marine Blue #01386A ΔE 0.077
- Marine #042E60 ΔE 0.077
- Dark Blue Grey #1F3B4D ΔE 0.078
Use #3F2B5E 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.