#5B3166
Closest named color: Grape Purple (#5D1451). oklch(38.9% 0.099 319), rgb(91, 49, 102).
Aa
White text reads best on this color (10.11:1).
About this color
#5B3166 is a dark, moderately saturated purple. In OKLCH its lightness is 39%, its chroma 0.099 and its hue 319°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Grape Purple (#5D1451), ΔE 0.064 away. White text reads best on it, at 10.11:1.
| Hue family | Purples |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Grape Purple (#5D1451) |
| Black text | 2.07:1 |
| White text | 10.11:1 |
Values
| HEX | #5B3166 |
| RGB | rgb(91, 49, 102) |
| HSL | hsl(288, 35%, 30%) |
| OKLCH | oklch(38.9% 0.099 319) |
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 #5B3166 | 10.11:1 | AAA | Lc -97.3 | Preferred for body text |
| Black text on #5B3166 | 2.07:1 | Fails | Lc 10.7 | Not readable |
| #5B3166 text on white | 10.11:1 | AAA | Lc 93.2 | Preferred for body text |
| #5B3166 text on black | 2.07:1 | Fails | Lc -9.3 | 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
#F8F3FA
oklch(97% 0.011 316.5)
-
Step 100
100
#F0E6F3
oklch(93.7% 0.02 318.4)
-
Step 200
200
#E5D1EB
oklch(88.5% 0.041 318.4)
-
Step 300
300
#D6B2E0
oklch(81% 0.075 318.8)
-
Step 400
400
#C088D0
oklch(70.7% 0.119 318.6)
-
Step 500
500
#B068C3
oklch(63.1% 0.152 319)
-
Step 600
600
#9B4DAF
oklch(55.6% 0.165 319.1)
-
Step 700
700
#843D97
oklch(49% 0.154 318.7)
-
Step 800
800
#6C337A
oklch(42.7% 0.127 319.4)
-
Step 900
900 (this color)
#5B3166
oklch(38.9% 0.099 319)
-
Step 950
950
#331B3A
oklch(26.9% 0.064 318.3)
#5B3166 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) | #283F68 | 0.089 |
| Deuteranopia (no green cones) | #344365 | 0.080 |
| Tritanopia (no blue cones) | #5B3846 | 0.063 |
| Achromatopsia (no color) | #424242 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3166
#5B3166
oklch(38.9% 0.099 319)
- #255118
#255118
oklch(39% 0.099 139.3)
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 #5B3166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Grape Purple #5D1451 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.073
- Rich Purple #720058 ΔE 0.080
- Velvet #750851 ΔE 0.081
- Purple Brown #673A3F ΔE 0.082
- Rebecca Purple #663399 ΔE 0.087
- Blueberry #464196 ΔE 0.091
- Brownish Purple #76424E ΔE 0.091
Use #5B3166 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.