#573F73
Closest named color: Dark Slate Blue (#483D8B). oklch(41.7% 0.088 304.1), rgb(87, 63, 115).
Aa
White text reads best on this color (8.88:1).
About this color
#573F73 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.088 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.049 away. White text reads best on it, at 8.88:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.088) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.36:1 |
| White text | 8.88:1 |
Values
| HEX | #573F73 |
| RGB | rgb(87, 63, 115) |
| HSL | hsl(268, 29%, 35%) |
| OKLCH | oklch(41.7% 0.088 304.1) |
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 #573F73 | 8.88:1 | AAA | Lc -94.7 | Preferred for body text |
| Black text on #573F73 | 2.36:1 | Fails | Lc 13.7 | Not readable |
| #573F73 text on white | 8.88:1 | AAA | Lc 90.2 | Preferred for body text |
| #573F73 text on black | 2.36:1 | Fails | Lc -12.1 | 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE8F2
oklch(93.7% 0.014 304.1)
-
Step 200
200
#DDD5E9
oklch(88.5% 0.028 303.9)
-
Step 300
300
#C8B9DC
oklch(80.9% 0.051 304.7)
-
Step 400
400
#AC94CB
oklch(70.7% 0.083 304.3)
-
Step 500
500
#9779BD
oklch(63.1% 0.105 303.8)
-
Step 600
600
#8261A9
oklch(55.6% 0.114 304.1)
-
Step 700
700
#6E5091
oklch(49.1% 0.106 304.1)
-
Step 800
800 (this color)
#573F73
oklch(41.7% 0.088 304.1)
-
Step 900
900
#4A385F
oklch(37.8% 0.068 304.6)
-
Step 950
950
#2B2138
oklch(27% 0.044 303.6)
#573F73 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) | #324975 | 0.061 |
| Deuteranopia (no green cones) | #374A72 | 0.057 |
| Tritanopia (no blue cones) | #524853 | 0.067 |
| Achromatopsia (no color) | #4A4A4A | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F73
#573F73
oklch(41.7% 0.088 304.1)
- #425417
#425417
oklch(41.7% 0.088 124.3)
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 #573F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.049
- Twilight #4E518B ΔE 0.057
- Dusk #4E5481 ΔE 0.059
- Blueberry #464196 ΔE 0.064
- Dusty Grape #545775 ΔE 0.068
- Rebecca Purple #663399 ΔE 0.076
- YInMn Blue #415A77 ΔE 0.081
- Dusk Blue #26538D ΔE 0.085
Use #573F73 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.