#5B3F71
Closest named color: Dark Slate Blue (#483D8B). oklch(42.1% 0.087 308.9), rgb(91, 63, 113).
Aa
White text reads best on this color (8.77:1).
About this color
#5B3F71 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.087 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.057 away. White text reads best on it, at 8.77:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.087) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.39:1 |
| White text | 8.77:1 |
Values
| HEX | #5B3F71 |
| RGB | rgb(91, 63, 113) |
| HSL | hsl(274, 28%, 35%) |
| OKLCH | oklch(42.1% 0.087 308.9) |
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 #5B3F71 | 8.77:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #5B3F71 | 2.39:1 | Fails | Lc 14.1 | Not readable |
| #5B3F71 text on white | 8.77:1 | AAA | Lc 89.9 | Fine for body text |
| #5B3F71 text on black | 2.39:1 | Fails | Lc -12.4 | 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 800.
-
Step 50
50
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EDE7F1
oklch(93.6% 0.015 312.2)
-
Step 200
200
#DED4E8
oklch(88.4% 0.029 308.1)
-
Step 300
300
#CAB8DA
oklch(80.8% 0.051 309)
-
Step 400
400
#AF93C7
oklch(70.7% 0.08 308.9)
-
Step 500
500
#9C78B9
oklch(63.2% 0.103 309.1)
-
Step 600
600
#8660A5
oklch(55.6% 0.111 308.5)
-
Step 700
700
#724F8D
oklch(49.2% 0.103 309)
-
Step 800
800 (this color)
#5B3F71
oklch(42.1% 0.087 308.9)
-
Step 900
900
#4C375D
oklch(37.7% 0.068 308.8)
-
Step 950
950
#2C2036
oklch(26.8% 0.043 308.7)
#5B3F71 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) | #344973 | 0.065 |
| Deuteranopia (no green cones) | #3B4B70 | 0.059 |
| Tritanopia (no blue cones) | #584752 | 0.064 |
| Achromatopsia (no color) | #4B4B4B | 0.087 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3F71
#5B3F71
oklch(42.1% 0.087 308.9)
- #3E561E
#3E561E
oklch(42% 0.087 129.1)
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 #5B3F71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.057
- Twilight #4E518B ΔE 0.060
- Dusk #4E5481 ΔE 0.060
- Dusty Grape #545775 ΔE 0.068
- Blueberry #464196 ΔE 0.071
- Rebecca Purple #663399 ΔE 0.077
- Brownish Purple #76424E ΔE 0.081
- YInMn Blue #415A77 ΔE 0.082
Use #5B3F71 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.