#573F66
Closest named color: Dusk (#4E5481). oklch(41% 0.07 311.7), rgb(87, 63, 102).
Aa
White text reads best on this color (9.09:1).
About this color
#573F66 is a dark, muted purple. In OKLCH its lightness is 41%, its chroma 0.070 and its hue 312°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.066 away. White text reads best on it, at 9.09:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | muted (0.070) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.30:1 |
| White text | 9.09:1 |
Values
| HEX | #573F66 |
| RGB | rgb(87, 63, 102) |
| HSL | hsl(277, 24%, 32%) |
| OKLCH | oklch(41% 0.07 311.7) |
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 #573F66 | 9.09:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #573F66 | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #573F66 text on white | 9.09:1 | AAA | Lc 90.9 | Preferred for body text |
| #573F66 text on black | 2.30:1 | Fails | Lc -11.5 | 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
#F7F4F8
oklch(97.1% 0.006 317.8)
-
Step 100
100
#ECE8F0
oklch(93.6% 0.011 308.3)
-
Step 200
200
#DED5E4
oklch(88.5% 0.022 312.2)
-
Step 300
300
#C9BAD4
oklch(80.9% 0.04 311.1)
-
Step 400
400
#AE95BF
oklch(70.6% 0.066 311.5)
-
Step 500
500
#9A7BAE
oklch(63.1% 0.082 311.7)
-
Step 600
600
#85639A
oklch(55.5% 0.091 311.9)
-
Step 700
700
#715283
oklch(49.1% 0.084 312.5)
-
Step 800
800 (this color)
#573F66
oklch(41% 0.07 311.7)
-
Step 900
900
#4B3957
oklch(37.7% 0.055 311.3)
-
Step 950
950
#2C2233
oklch(27.1% 0.034 310.9)
#573F66 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) | #384767 | 0.053 |
| Deuteranopia (no green cones) | #3E4965 | 0.049 |
| Tritanopia (no blue cones) | #56444D | 0.049 |
| Achromatopsia (no color) | #484848 | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F66
#573F66
oklch(41% 0.07 311.7)
- #3C5229
#3C5229
oklch(40.9% 0.069 131.9)
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 #573F66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.066
- Dusty Grape #545775 ΔE 0.068
- Purple Brown #673A3F ΔE 0.069
- Dark Slate Blue #483D8B ΔE 0.069
- Twilight #4E518B ΔE 0.071
- Brownish Purple #76424E ΔE 0.074
- Dark Grey Blue #29465B ΔE 0.077
- YInMn Blue #415A77 ΔE 0.080
Use #573F66 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.