#5B3376
Closest named color: Dark Slate Blue (#483D8B). oklch(40.2% 0.115 309.8), rgb(91, 51, 118).
Aa
White text reads best on this color (9.63:1).
About this color
#5B3376 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.115 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 9.63:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.115) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.17:1 |
| White text | 9.63:1 |
Values
| HEX | #5B3376 |
| RGB | rgb(91, 51, 118) |
| HSL | hsl(276, 40%, 33%) |
| OKLCH | oklch(40.2% 0.115 309.8) |
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 #5B3376 | 9.63:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #5B3376 | 2.17:1 | Fails | Lc 11.9 | Not readable |
| #5B3376 text on white | 9.63:1 | AAA | Lc 92.0 | Preferred for body text |
| #5B3376 text on black | 2.17:1 | Fails | Lc -10.4 | 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
#EEE7F4
oklch(93.7% 0.019 309.8)
-
Step 200
200
#E1D3EC
oklch(88.6% 0.037 310.5)
-
Step 300
300
#CEB5E2
oklch(80.9% 0.068 309.9)
-
Step 400
400
#B58DD3
oklch(70.6% 0.108 309.9)
-
Step 500
500
#A370C7
oklch(63.2% 0.137 310)
-
Step 600
600
#8E56B4
oklch(55.6% 0.15 309.9)
-
Step 700
700
#78469B
oklch(49.1% 0.139 309.4)
-
Step 800
800 (this color)
#5B3376
oklch(40.2% 0.115 309.8)
-
Step 900
900
#503265
oklch(37.7% 0.091 309.8)
-
Step 950
950
#2F1E3B
oklch(27.1% 0.056 310.1)
#5B3376 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) | #1F4378 | 0.096 |
| Deuteranopia (no green cones) | #2C4574 | 0.086 |
| Tritanopia (no blue cones) | #573F4F | 0.082 |
| Achromatopsia (no color) | #454545 | 0.116 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B3376
#5B3376
oklch(40.2% 0.115 309.8)
- #345300
#345300
oklch(40.2% 0.108 130)
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 #5B3376, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Rebecca Purple #663399 ΔE 0.061
- Blueberry #464196 ΔE 0.069
- Twilight #4E518B ΔE 0.081
- Grape Purple #5D1451 ΔE 0.082
- Dusk #4E5481 ΔE 0.088
- Rich Purple #720058 ΔE 0.092
- Indigo #4B0082 ΔE 0.093
Use #5B3376 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.