#573A81
Closest named color: Dark Slate Blue (#483D8B). oklch(41.7% 0.116 300.3), rgb(87, 58, 129).
Aa
White text reads best on this color (9.02:1).
About this color
#573A81 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.116 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 0.031 away. White text reads best on it, at 9.02:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.116) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.32:1 |
| White text | 9.02:1 |
Values
| HEX | #573A81 |
| RGB | rgb(87, 58, 129) |
| HSL | hsl(265, 38%, 37%) |
| OKLCH | oklch(41.7% 0.116 300.3) |
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 #573A81 | 9.02:1 | AAA | Lc -94.9 | Preferred for body text |
| Black text on #573A81 | 2.32:1 | Fails | Lc 13.5 | Not readable |
| #573A81 text on white | 9.02:1 | AAA | Lc 90.5 | Preferred for body text |
| #573A81 text on black | 2.32:1 | Fails | Lc -11.8 | 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
#DDD4EF
oklch(88.5% 0.038 300.8)
-
Step 300
300
#C7B7E7
oklch(80.9% 0.069 300.1)
-
Step 400
400
#AB91DA
oklch(70.7% 0.108 300)
-
Step 500
500
#9774D0
oklch(63.1% 0.138 300)
-
Step 600
600
#825ABD
oklch(55.5% 0.151 300.2)
-
Step 700
700
#6E49A3
oklch(49% 0.141 300.2)
-
Step 800
800 (this color)
#573A81
oklch(41.7% 0.116 300.3)
-
Step 900
900
#4A356A
oklch(37.8% 0.09 300.4)
-
Step 950
950
#2B1F3E
oklch(27% 0.058 300.4)
#573A81 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) | #204983 | 0.082 |
| Deuteranopia (no green cones) | #28487F | 0.076 |
| Tritanopia (no blue cones) | #4E4857 | 0.091 |
| Achromatopsia (no color) | #494949 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573A81
#573A81
oklch(41.7% 0.116 300.3)
- #455300
#455300
oklch(41.5% 0.099 120.2)
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 #573A81, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Blueberry #464196 ΔE 0.046
- Rebecca Purple #663399 ΔE 0.050
- Twilight #4E518B ΔE 0.061
- Dusk #4E5481 ΔE 0.071
- Cobalt #1E488F ΔE 0.084
- Dusty Grape #545775 ΔE 0.088
- Dusk Blue #26538D ΔE 0.088
Use #573A81 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.