#573F69
Closest named color: Dusk (#4E5481). oklch(41.2% 0.074 309.7), rgb(87, 63, 105).
Aa
White text reads best on this color (9.05:1).
About this color
#573F69 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.074 and its hue 310°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dusk (#4E5481), ΔE 0.064 away. White text reads best on it, at 9.05:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.074) |
| Temperature | in between |
| Nearest name | Dusk (#4E5481) |
| Black text | 2.32:1 |
| White text | 9.05:1 |
Values
| HEX | #573F69 |
| RGB | rgb(87, 63, 105) |
| HSL | hsl(274, 25%, 33%) |
| OKLCH | oklch(41.2% 0.074 309.7) |
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 #573F69 | 9.05:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #573F69 | 2.32:1 | Fails | Lc 13.3 | Not readable |
| #573F69 text on white | 9.05:1 | AAA | Lc 90.7 | Preferred for body text |
| #573F69 text on black | 2.32:1 | Fails | Lc -11.6 | 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
#F6F4F8
oklch(97% 0.006 308.4)
-
Step 100
100
#ECE8F0
oklch(93.6% 0.011 308.3)
-
Step 200
200
#DED5E5
oklch(88.5% 0.024 310.7)
-
Step 300
300
#C9B9D6
oklch(80.8% 0.044 310)
-
Step 400
400
#AE95C1
oklch(70.7% 0.069 310.3)
-
Step 500
500
#9A7AB2
oklch(63.1% 0.089 310)
-
Step 600
600
#84639E
oklch(55.6% 0.096 309.2)
-
Step 700
700
#705287
oklch(49.2% 0.089 309.4)
-
Step 800
800 (this color)
#573F69
oklch(41.2% 0.074 309.7)
-
Step 900
900
#4B3959
oklch(37.8% 0.058 309.5)
-
Step 950
950
#2C2134
oklch(26.9% 0.038 310.4)
#573F69 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) | #37486B | 0.055 |
| Deuteranopia (no green cones) | #3C4968 | 0.051 |
| Tritanopia (no blue cones) | #55454F | 0.053 |
| Achromatopsia (no color) | #494949 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F69
#573F69
oklch(41.2% 0.074 309.7)
- #3E5325
#3E5325
oklch(41.3% 0.075 129.4)
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 #573F69, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk #4E5481 ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.064
- Twilight #4E518B ΔE 0.067
- Dusty Grape #545775 ΔE 0.067
- Purple Brown #673A3F ΔE 0.073
- Brownish Purple #76424E ΔE 0.077
- Dark Grey Blue #29465B ΔE 0.079
- Blueberry #464196 ΔE 0.080
Use #573F69 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.