#5B3775
Closest named color: Dark Slate Blue (#483D8B). oklch(40.9% 0.107 309.2), rgb(91, 55, 117).
Aa
White text reads best on this color (9.34:1).
About this color
#5B3775 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.107 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 0.050 away. White text reads best on it, at 9.34:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #5B3775 |
| RGB | rgb(91, 55, 117) |
| HSL | hsl(275, 36%, 34%) |
| OKLCH | oklch(40.9% 0.107 309.2) |
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 #5B3775 | 9.34:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #5B3775 | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #5B3775 text on white | 9.34:1 | AAA | Lc 91.3 | Preferred for body text |
| #5B3775 text on black | 2.24:1 | Fails | Lc -11.0 | 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 800.
-
Step 50
50
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#E0D3EB
oklch(88.5% 0.035 309.7)
-
Step 300
300
#CDB6E0
oklch(80.9% 0.063 309.6)
-
Step 400
400
#B38FD0
oklch(70.7% 0.1 309.3)
-
Step 500
500
#A072C3
oklch(63% 0.127 309.3)
-
Step 600
600
#8B59B0
oklch(55.6% 0.139 309.1)
-
Step 700
700
#764997
oklch(49.1% 0.128 309.1)
-
Step 800
800 (this color)
#5B3775
oklch(40.9% 0.107 309.2)
-
Step 900
900
#4F3463
oklch(37.8% 0.084 309.4)
-
Step 950
950
#2E1F3A
oklch(27.1% 0.052 308.8)
#5B3775 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) | #264577 | 0.086 |
| Deuteranopia (no green cones) | #314773 | 0.077 |
| Tritanopia (no blue cones) | #584150 | 0.076 |
| Achromatopsia (no color) | #474747 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3775
#5B3775
oklch(40.9% 0.107 309.2)
- #375403
#375403
oklch(40.7% 0.106 129.1)
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 #5B3775, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Rebecca Purple #663399 ΔE 0.064
- Blueberry #464196 ΔE 0.067
- Twilight #4E518B ΔE 0.073
- Dusk #4E5481 ΔE 0.079
- Grape Purple #5D1451 ΔE 0.088
- Dusty Grape #545775 ΔE 0.090
- Brownish Purple #76424E ΔE 0.097
Use #5B3775 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.