#5A3573
Closest named color: Dark Slate Blue (#483D8B). oklch(40.3% 0.107 310), rgb(90, 53, 115).
Aa
White text reads best on this color (9.58:1).
About this color
#5A3573 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.107 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 9.58:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.107) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.58:1 |
Values
| HEX | #5A3573 |
| RGB | rgb(90, 53, 115) |
| HSL | hsl(276, 37%, 33%) |
| OKLCH | oklch(40.3% 0.107 310) |
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 #5A3573 | 9.58:1 | AAA | Lc -96.2 | Preferred for body text |
| Black text on #5A3573 | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #5A3573 text on white | 9.58:1 | AAA | Lc 91.9 | Preferred for body text |
| #5A3573 text on black | 2.19:1 | Fails | Lc -10.5 | 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
#EDE7F3
oklch(93.6% 0.017 308.3)
-
Step 200
200
#E0D3EB
oklch(88.5% 0.035 309.7)
-
Step 300
300
#CDB6DF
oklch(80.9% 0.062 310.2)
-
Step 400
400
#B48FD0
oklch(70.8% 0.101 309.9)
-
Step 500
500
#A172C3
oklch(63.1% 0.128 309.9)
-
Step 600
600
#8C59AF
oklch(55.6% 0.138 310)
-
Step 700
700
#774897
oklch(49.1% 0.13 309.9)
-
Step 800
800 (this color)
#5A3573
oklch(40.3% 0.107 310)
-
Step 900
900
#4F3462
oklch(37.7% 0.082 310)
-
Step 950
950
#2E1F3A
oklch(27.1% 0.052 308.8)
#5A3573 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) | #244375 | 0.088 |
| Deuteranopia (no green cones) | #304671 | 0.079 |
| Tritanopia (no blue cones) | #573F4F | 0.074 |
| Achromatopsia (no color) | #454545 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5A3573
#5A3573
oklch(40.3% 0.107 310)
- #345301
#345301
oklch(40.2% 0.108 130.1)
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 #5A3573, 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 0.067
- Blueberry #464196 ΔE 0.070
- Twilight #4E518B ΔE 0.079
- Grape Purple #5D1451 ΔE 0.082
- Dusk #4E5481 ΔE 0.084
- Rich Purple #720058 ΔE 0.094
- Dusty Grape #545775 ΔE 0.094
Use #5A3573 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.