#5A3587
Closest named color: Dark Slate Blue (#483D8B). oklch(41.6% 0.133 301.7), rgb(90, 53, 135).
Aa
White text reads best on this color (9.15:1).
About this color
#5A3587 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.133 and its hue 302°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.036 away. White text reads best on it, at 9.15:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.133) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.29:1 |
| White text | 9.15:1 |
Values
| HEX | #5A3587 |
| RGB | rgb(90, 53, 135) |
| HSL | hsl(267, 44%, 37%) |
| OKLCH | oklch(41.6% 0.133 301.7) |
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 #5A3587 | 9.15:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #5A3587 | 2.29:1 | Fails | Lc 13.3 | Not readable |
| #5A3587 text on white | 9.15:1 | AAA | Lc 90.7 | Preferred for body text |
| #5A3587 text on black | 2.29:1 | Fails | Lc -11.6 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#ECE7F7
oklch(93.7% 0.022 300.2)
-
Step 200
200
#DED3F2
oklch(88.5% 0.044 301.7)
-
Step 300
300
#C9B5EB
oklch(80.8% 0.078 301.6)
-
Step 400
400
#AF8DE1
oklch(70.7% 0.124 301.9)
-
Step 500
500
#9C6ED8
oklch(63.1% 0.159 302.1)
-
Step 600
600
#8754C6
oklch(55.7% 0.172 301.7)
-
Step 700
700
#7243AB
oklch(49% 0.161 301.5)
-
Step 800
800 (this color)
#5A3587
oklch(41.6% 0.133 301.7)
-
Step 900
900
#4C316F
oklch(37.6% 0.105 301.7)
-
Step 950
950
#2C1D41
oklch(26.9% 0.067 301.3)
#5A3587 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) | #0B478A | 0.103 |
| Deuteranopia (no green cones) | #1E4885 | 0.094 |
| Tritanopia (no blue cones) | #514658 | 0.101 |
| Achromatopsia (no color) | #484848 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A3587
#5A3587
oklch(41.6% 0.133 301.7)
- #435400
#435400
oklch(41.6% 0.101 122.1)
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 #5A3587, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.036
- Rebecca Purple #663399 ΔE 0.037
- Blueberry #464196 ΔE 0.048
- Twilight #4E518B ΔE 0.072
- Dusk #4E5481 ΔE 0.085
- Chrysanthemum #560BAD ΔE 0.086
- Indigo #4B0082 ΔE 0.090
- Cobalt #1E488F ΔE 0.092
Use #5A3587 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.