#573B80
Closest named color: Dark Slate Blue (#483D8B). oklch(41.8% 0.113 300.3), rgb(87, 59, 128).
Aa
White text reads best on this color (8.96:1).
About this color
#573B80 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.113 and its hue 300°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.032 away. White text reads best on it, at 8.96:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.113) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.34:1 |
| White text | 8.96:1 |
Values
| HEX | #573B80 |
| RGB | rgb(87, 59, 128) |
| HSL | hsl(264, 37%, 37%) |
| OKLCH | oklch(41.8% 0.113 300.3) |
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 #573B80 | 8.96:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #573B80 | 2.34:1 | Fails | Lc 13.6 | Not readable |
| #573B80 text on white | 8.96:1 | AAA | Lc 90.3 | Preferred for body text |
| #573B80 text on black | 2.34:1 | Fails | Lc -11.9 | 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
#ECE7F5
oklch(93.6% 0.019 302.2)
-
Step 200
200
#DDD4EE
oklch(88.5% 0.037 301.4)
-
Step 300
300
#C7B7E6
oklch(80.8% 0.067 300.5)
-
Step 400
400
#AB91D9
oklch(70.7% 0.106 300.3)
-
Step 500
500
#9774CE
oklch(63% 0.135 300.5)
-
Step 600
600
#825BBB
oklch(55.6% 0.147 300.4)
-
Step 700
700
#6E4AA1
oklch(49% 0.137 300.5)
-
Step 800
800 (this color)
#573B80
oklch(41.8% 0.113 300.3)
-
Step 900
900
#493569
oklch(37.7% 0.088 299.9)
-
Step 950
950
#2B1F3D
oklch(26.9% 0.056 301.2)
#573B80 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) | #224982 | 0.080 |
| Deuteranopia (no green cones) | #2A497E | 0.074 |
| Tritanopia (no blue cones) | #4F4857 | 0.087 |
| Achromatopsia (no color) | #494949 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B80
#573B80
oklch(41.8% 0.113 300.3)
- #465400
#465400
oklch(41.9% 0.1 120.1)
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 #573B80, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.032
- Blueberry #464196 ΔE 0.047
- Rebecca Purple #663399 ΔE 0.053
- Twilight #4E518B ΔE 0.059
- Dusk #4E5481 ΔE 0.069
- Cobalt #1E488F ΔE 0.083
- Dusty Grape #545775 ΔE 0.085
- Dusk Blue #26538D ΔE 0.087
Use #573B80 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.