#573B85
Closest named color: Dark Slate Blue (#483D8B). oklch(42.1% 0.12 298.6), rgb(87, 59, 133).
Aa
White text reads best on this color (8.86:1).
About this color
#573B85 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.120 and its hue 299°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.028 away. White text reads best on it, at 8.86:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.120) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.36:1 |
| White text | 8.86:1 |
Values
| HEX | #573B85 |
| RGB | rgb(87, 59, 133) |
| HSL | hsl(263, 39%, 38%) |
| OKLCH | oklch(42.1% 0.12 298.6) |
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 #573B85 | 8.86:1 | AAA | Lc -94.5 | Preferred for body text |
| Black text on #573B85 | 2.36:1 | Fails | Lc 13.9 | Not readable |
| #573B85 text on white | 8.86:1 | AAA | Lc 90.0 | Preferred for body text |
| #573B85 text on black | 2.36:1 | Fails | Lc -12.2 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DCD4F0
oklch(88.5% 0.039 298.7)
-
Step 300
300
#C6B7E8
oklch(80.8% 0.07 298.8)
-
Step 400
400
#AA91DD
oklch(70.8% 0.112 298.6)
-
Step 500
500
#9673D4
oklch(63.1% 0.145 298.8)
-
Step 600
600
#815AC1
oklch(55.7% 0.156 298.7)
-
Step 700
700
#6D49A6
oklch(49.1% 0.145 298.8)
-
Step 800
800 (this color)
#573B85
oklch(42.1% 0.12 298.6)
-
Step 900
900
#49346C
oklch(37.7% 0.095 299.1)
-
Step 950
950
#2A1F3F
oklch(26.9% 0.059 298.2)
#573B85 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) | #1D4A88 | 0.083 |
| Deuteranopia (no green cones) | #264983 | 0.077 |
| Tritanopia (no blue cones) | #4D4A5A | 0.094 |
| Achromatopsia (no color) | #4A4A4A | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B85
#573B85
oklch(42.1% 0.12 298.6)
- #485400
#485400
oklch(42% 0.099 118.8)
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 #573B85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.028
- Blueberry #464196 ΔE 0.041
- Rebecca Purple #663399 ΔE 0.046
- Twilight #4E518B ΔE 0.058
- Dusk #4E5481 ΔE 0.070
- Cobalt #1E488F ΔE 0.082
- Dusk Blue #26538D ΔE 0.086
- Dusty Grape #545775 ΔE 0.088
Use #573B85 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.