#573D70
Closest named color: Dark Slate Blue (#483D8B). oklch(41.2% 0.088 306.4), rgb(87, 61, 112).
Aa
White text reads best on this color (9.10:1).
About this color
#573D70 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.088 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.053 away. White text reads best on it, at 9.10:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.088) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.30:1 |
| White text | 9.10:1 |
Values
| HEX | #573D70 |
| RGB | rgb(87, 61, 112) |
| HSL | hsl(271, 29%, 34%) |
| OKLCH | oklch(41.2% 0.088 306.4) |
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 #573D70 | 9.10:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #573D70 | 2.30:1 | Fails | Lc 13.1 | Not readable |
| #573D70 text on white | 9.10:1 | AAA | Lc 90.8 | Preferred for body text |
| #573D70 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
#F6F4F9
oklch(97% 0.007 304.2)
-
Step 100
100
#ECE7F2
oklch(93.5% 0.016 306.4)
-
Step 200
200
#DED5E8
oklch(88.6% 0.027 307)
-
Step 300
300
#C9B9DB
oklch(81% 0.05 306.5)
-
Step 400
400
#AD93C9
oklch(70.6% 0.082 306.3)
-
Step 500
500
#9A78BB
oklch(63.1% 0.105 306.9)
-
Step 600
600
#8460A7
oklch(55.5% 0.113 306.4)
-
Step 700
700
#704F90
oklch(49.1% 0.107 306.3)
-
Step 800
800 (this color)
#573D70
oklch(41.2% 0.088 306.4)
-
Step 900
900
#4B375E
oklch(37.6% 0.069 306.9)
-
Step 950
950
#2C2137
oklch(27.1% 0.042 306.7)
#573D70 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) | #314772 | 0.063 |
| Deuteranopia (no green cones) | #37496F | 0.059 |
| Tritanopia (no blue cones) | #534551 | 0.064 |
| Achromatopsia (no color) | #484848 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573D70
#573D70
oklch(41.2% 0.088 306.4)
- #3F5318
#3F5318
oklch(41.2% 0.087 126)
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 #573D70, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.053
- Twilight #4E518B ΔE 0.064
- Dusk #4E5481 ΔE 0.065
- Blueberry #464196 ΔE 0.069
- Dusty Grape #545775 ΔE 0.073
- Rebecca Purple #663399 ΔE 0.078
- YInMn Blue #415A77 ΔE 0.086
- Purple Brown #673A3F ΔE 0.086
Use #573D70 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.