#5B377C
Closest named color: Dark Slate Blue (#483D8B). oklch(41.3% 0.116 306.1), rgb(91, 55, 124).
Aa
White text reads best on this color (9.20:1).
About this color
#5B377C is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.116 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.043 away. White text reads best on it, at 9.20:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.28:1 |
| White text | 9.20:1 |
Values
| HEX | #5B377C |
| RGB | rgb(91, 55, 124) |
| HSL | hsl(271, 39%, 35%) |
| OKLCH | oklch(41.3% 0.116 306.1) |
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 #5B377C | 9.20:1 | AAA | Lc -95.3 | Preferred for body text |
| Black text on #5B377C | 2.28:1 | Fails | Lc 13.0 | Not readable |
| #5B377C text on white | 9.20:1 | AAA | Lc 90.9 | Preferred for body text |
| #5B377C text on black | 2.28:1 | Fails | Lc -11.4 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#EDE7F5
oklch(93.7% 0.02 305.3)
-
Step 200
200
#DFD3ED
oklch(88.4% 0.037 306.4)
-
Step 300
300
#CBB6E4
oklch(80.9% 0.068 305.6)
-
Step 400
400
#B18FD6
oklch(70.7% 0.107 305.8)
-
Step 500
500
#9E71CB
oklch(63.1% 0.138 305.9)
-
Step 600
600
#8958B8
oklch(55.6% 0.15 305.7)
-
Step 700
700
#75479E
oklch(49.1% 0.14 306.4)
-
Step 800
800 (this color)
#5B377C
oklch(41.3% 0.116 306.1)
-
Step 900
900
#4E3367
oklch(37.7% 0.091 306.5)
-
Step 950
950
#2D1E3C
oklch(26.9% 0.057 306)
#5B377C 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) | #21467E | 0.090 |
| Deuteranopia (no green cones) | #2C487A | 0.083 |
| Tritanopia (no blue cones) | #564454 | 0.085 |
| Achromatopsia (no color) | #484848 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B377C
#5B377C
oklch(41.3% 0.116 306.1)
- #3D5500
#3D5500
oklch(41.4% 0.106 126.1)
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 #5B377C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.043
- Rebecca Purple #663399 ΔE 0.053
- Blueberry #464196 ΔE 0.058
- Twilight #4E518B ΔE 0.070
- Dusk #4E5481 ΔE 0.078
- Dusty Grape #545775 ΔE 0.092
- Cobalt #1E488F ΔE 0.095
- Grape Purple #5D1451 ΔE 0.095
Use #5B377C 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.