#3F3270
Closest named color: Dark Slate Blue (#483D8B). oklch(36.5% 0.103 290), rgb(63, 50, 112).
Aa
White text reads best on this color (11.04:1).
About this color
#3F3270 is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.103 and its hue 290°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.054 away. White text reads best on it, at 11.04:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.90:1 |
| White text | 11.04:1 |
Values
| HEX | #3F3270 |
| RGB | rgb(63, 50, 112) |
| HSL | hsl(253, 38%, 32%) |
| OKLCH | oklch(36.5% 0.103 290) |
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 #3F3270 | 11.04:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #3F3270 | 1.90:1 | Fails | Lc 8.6 | Not readable |
| #3F3270 text on white | 11.04:1 | AAA | Lc 95.3 | Preferred for body text |
| #3F3270 text on black | 1.90:1 | Fails | Lc -7.3 | 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
#D8D5F4
oklch(88.5% 0.042 289.9)
-
Step 300
300
#BFB9F0
oklch(80.9% 0.077 289.6)
-
Step 400
400
#A092E8
oklch(70.6% 0.124 290.3)
-
Step 500
500
#8A75E1
oklch(63.1% 0.158 290.1)
-
Step 600
600
#755BCF
oklch(55.6% 0.172 290)
-
Step 700
700
#624AB3
oklch(49.1% 0.16 289.7)
-
Step 800
800
#503D91
oklch(42.6% 0.133 290)
-
Step 900
900 (this color)
#3F3270
oklch(36.5% 0.103 290)
-
Step 950
950
#262044
oklch(27% 0.065 288.9)
#3F3270 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) | #163D72 | 0.058 |
| Deuteranopia (no green cones) | #173B6F | 0.056 |
| Tritanopia (no blue cones) | #313F4C | 0.084 |
| Achromatopsia (no color) | #3C3C3C | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F3270
#3F3270
oklch(36.5% 0.103 290)
- #414200
#414200
oklch(36.6% 0.08 110.7)
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 #3F3270, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.054
- Twilight Blue #0A437A ΔE 0.070
- Prussian Blue #1D3557 ΔE 0.070
- Marine Blue #01386A ΔE 0.071
- Blueberry #464196 ΔE 0.073
- Cobalt #1E488F ΔE 0.080
- Dark Grey Blue #29465B ΔE 0.081
- Marine #042E60 ΔE 0.083
Use #3F3270 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.