#573A71
Closest named color: Dark Slate Blue (#483D8B). oklch(40.7% 0.094 307), rgb(87, 58, 113).
Aa
White text reads best on this color (9.33:1).
About this color
#573A71 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.094 and its hue 307°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.050 away. White text reads best on it, at 9.33:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.094) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.33:1 |
Values
| HEX | #573A71 |
| RGB | rgb(87, 58, 113) |
| HSL | hsl(272, 32%, 34%) |
| OKLCH | oklch(40.7% 0.094 307) |
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 #573A71 | 9.33:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #573A71 | 2.24:1 | Fails | Lc 12.6 | Not readable |
| #573A71 text on white | 9.33:1 | AAA | Lc 91.4 | Preferred for body text |
| #573A71 text on black | 2.24:1 | Fails | Lc -11.0 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#ECE7F2
oklch(93.5% 0.016 306.4)
-
Step 200
200
#DED4E9
oklch(88.4% 0.03 307.1)
-
Step 300
300
#CAB8DD
oklch(81% 0.055 307.1)
-
Step 400
400
#AF92CC
oklch(70.7% 0.089 307.1)
-
Step 500
500
#9B76BF
oklch(63% 0.114 306.7)
-
Step 600
600
#865EAB
oklch(55.6% 0.123 306.8)
-
Step 700
700
#724D93
oklch(49.1% 0.115 307.1)
-
Step 800
800 (this color)
#573A71
oklch(40.7% 0.094 307)
-
Step 900
900
#4C3660
oklch(37.7% 0.074 307.3)
-
Step 950
950
#2C2038
oklch(26.9% 0.046 306.5)
#573A71 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) | #2C4673 | 0.071 |
| Deuteranopia (no green cones) | #344770 | 0.064 |
| Tritanopia (no blue cones) | #534350 | 0.069 |
| Achromatopsia (no color) | #474747 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573A71
#573A71
oklch(40.7% 0.094 307)
- #3C5210
#3C5210
oklch(40.6% 0.094 126.6)
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 #573A71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.050
- Blueberry #464196 ΔE 0.067
- Twilight #4E518B ΔE 0.069
- Dusk #4E5481 ΔE 0.072
- Rebecca Purple #663399 ΔE 0.074
- Dusty Grape #545775 ΔE 0.081
- Purple Brown #673A3F ΔE 0.090
- Dark Grey Blue #29465B ΔE 0.091
Use #573A71 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.