#573B94
Closest named color: Dark Slate Blue (#483D8B). oklch(43.2% 0.14 294.3), rgb(87, 59, 148).
Aa
White text reads best on this color (8.54:1).
About this color
#573B94 is a dark, vivid purple. In OKLCH its lightness is 43%, its chroma 0.140 and its hue 294°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.030 away. White text reads best on it, at 8.54:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | vivid (0.140) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.45:1 |
| White text | 8.54:1 |
Values
| HEX | #573B94 |
| RGB | rgb(87, 59, 148) |
| HSL | hsl(259, 43%, 41%) |
| OKLCH | oklch(43.2% 0.14 294.3) |
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 #573B94 | 8.54:1 | AAA | Lc -93.6 | Preferred for body text |
| Black text on #573B94 | 2.45:1 | Fails | Lc 15.0 | Not readable |
| #573B94 text on white | 8.54:1 | AAA | Lc 89.0 | Fine for body text |
| #573B94 text on black | 2.45:1 | Fails | Lc -13.2 | 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
#F6F4FC
oklch(97.1% 0.011 297.6)
-
Step 100
100
#EAE7F9
oklch(93.6% 0.024 293.6)
-
Step 200
200
#DAD4F5
oklch(88.5% 0.045 293.8)
-
Step 300
300
#C3B7F1
oklch(80.9% 0.082 294)
-
Step 400
400
#A68FEA
oklch(70.7% 0.132 294.4)
-
Step 500
500
#9171E3
oklch(63.2% 0.167 294)
-
Step 600
600
#7D56D1
oklch(55.7% 0.182 294.4)
-
Step 700
700
#6945B5
oklch(49.1% 0.169 294.1)
-
Step 800
800 (this color)
#573B94
oklch(43.2% 0.14 294.3)
-
Step 900
900
#463375
oklch(37.8% 0.109 293.8)
-
Step 950
950
#291E44
oklch(26.9% 0.069 294.7)
#573B94 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) | #004D97 | 0.095 |
| Deuteranopia (no green cones) | #104B92 | 0.090 |
| Tritanopia (no blue cones) | #474E61 | 0.111 |
| Achromatopsia (no color) | #4C4C4C | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B94
#573B94
oklch(43.2% 0.14 294.3)
- #505600
#505600
oklch(43.3% 0.098 114.4)
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 #573B94, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.030
- Blueberry #464196 ΔE 0.031
- Rebecca Purple #663399 ΔE 0.032
- Twilight #4E518B ΔE 0.061
- Dusk #4E5481 ΔE 0.078
- Chrysanthemum #560BAD ΔE 0.080
- Blue With A Hint Of Purple #533CC6 ΔE 0.081
- Cobalt #1E488F ΔE 0.081
Use #573B94 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.