#5A3778
Closest named color: Dark Slate Blue (#483D8B). oklch(40.9% 0.11 307.1), rgb(90, 55, 120).
Aa
White text reads best on this color (9.32:1).
About this color
#5A3778 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.110 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 9.32:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.110) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #5A3778 |
| RGB | rgb(90, 55, 120) |
| HSL | hsl(272, 37%, 34%) |
| OKLCH | oklch(40.9% 0.11 307.1) |
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 #5A3778 | 9.32:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #5A3778 | 2.25:1 | Fails | Lc 12.7 | Not readable |
| #5A3778 text on white | 9.32:1 | AAA | Lc 91.3 | Preferred for body text |
| #5A3778 text on black | 2.25:1 | Fails | Lc -11.1 | 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
#EDE7F4
oklch(93.6% 0.018 306.7)
-
Step 200
200
#DFD3EC
oklch(88.4% 0.036 307.2)
-
Step 300
300
#CBB6E2
oklch(80.8% 0.065 306.6)
-
Step 400
400
#B18FD3
oklch(70.6% 0.103 306.8)
-
Step 500
500
#9F72C7
oklch(63.1% 0.132 307.4)
-
Step 600
600
#8A59B4
oklch(55.7% 0.144 307.2)
-
Step 700
700
#75489B
oklch(49.1% 0.134 307.2)
-
Step 800
800 (this color)
#5A3778
oklch(40.9% 0.11 307.1)
-
Step 900
900
#4E3465
oklch(37.8% 0.086 307.2)
-
Step 950
950
#2D1F3B
oklch(27% 0.054 306.2)
#5A3778 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) | #24467A | 0.087 |
| Deuteranopia (no green cones) | #2E4776 | 0.079 |
| Tritanopia (no blue cones) | #554252 | 0.079 |
| Achromatopsia (no color) | #474747 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A3778
#5A3778
oklch(40.9% 0.11 307.1)
- #3A5400
#3A5400
oklch(40.9% 0.106 127.4)
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 #5A3778, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Rebecca Purple #663399 ΔE 0.060
- Blueberry #464196 ΔE 0.062
- Twilight #4E518B ΔE 0.072
- Dusk #4E5481 ΔE 0.078
- Dusty Grape #545775 ΔE 0.091
- Grape Purple #5D1451 ΔE 0.091
- Cobalt #1E488F ΔE 0.095
Use #5A3778 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.