#5A3371
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.108 311.5), rgb(90, 51, 113).
Aa
White text reads best on this color (9.78:1).
About this color
#5A3371 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.108 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.056 away. White text reads best on it, at 9.78:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.108) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.14:1 |
| White text | 9.78:1 |
Values
| HEX | #5A3371 |
| RGB | rgb(90, 51, 113) |
| HSL | hsl(278, 38%, 32%) |
| OKLCH | oklch(39.8% 0.108 311.5) |
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 #5A3371 | 9.78:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #5A3371 | 2.14:1 | Fails | Lc 11.5 | Not readable |
| #5A3371 text on white | 9.78:1 | AAA | Lc 92.4 | Preferred for body text |
| #5A3371 text on black | 2.14:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F8F3FB
oklch(97% 0.012 313.2)
-
Step 100
100
#EFE6F6
oklch(93.7% 0.023 310.7)
-
Step 200
200
#E3D1EF
oklch(88.4% 0.045 312)
-
Step 300
300
#D2B2E7
oklch(80.9% 0.081 311.8)
-
Step 400
400
#BB88DC
oklch(70.7% 0.13 311.3)
-
Step 500
500
#AA67D2
oklch(63.1% 0.167 311.4)
-
Step 600
600
#954CBF
oklch(55.7% 0.18 311.2)
-
Step 700
700
#7F3CA4
oklch(49.1% 0.167 311.5)
-
Step 800
800
#673285
oklch(42.6% 0.139 311.3)
-
Step 900
900 (this color)
#5A3371
oklch(39.8% 0.108 311.5)
-
Step 950
950
#311B3F
oklch(27% 0.069 310.8)
#5A3371 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) | #234273 | 0.091 |
| Deuteranopia (no green cones) | #2F456F | 0.082 |
| Tritanopia (no blue cones) | #573D4D | 0.074 |
| Achromatopsia (no color) | #444444 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A3371
#5A3371
oklch(39.8% 0.108 311.5)
- #315202
#315202
oklch(39.8% 0.108 131.3)
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 #5A3371, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Rebecca Purple #663399 ΔE 0.069
- Blueberry #464196 ΔE 0.074
- Grape Purple #5D1451 ΔE 0.077
- Twilight #4E518B ΔE 0.084
- Dusk #4E5481 ΔE 0.089
- Rich Purple #720058 ΔE 0.090
- Velvet #750851 ΔE 0.092
Use #5A3371 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.