#573571
Closest named color: Dark Slate Blue (#483D8B). oklch(39.8% 0.104 308.6), rgb(87, 53, 113).
Aa
White text reads best on this color (9.75:1).
About this color
#573571 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.104 and its hue 309°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.052 away. White text reads best on it, at 9.75:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.104) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.15:1 |
| White text | 9.75:1 |
Values
| HEX | #573571 |
| RGB | rgb(87, 53, 113) |
| HSL | hsl(274, 36%, 33%) |
| OKLCH | oklch(39.8% 0.104 308.6) |
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 #573571 | 9.75:1 | AAA | Lc -96.6 | Preferred for body text |
| Black text on #573571 | 2.15:1 | Fails | Lc 11.6 | Not readable |
| #573571 text on white | 9.75:1 | AAA | Lc 92.4 | Preferred for body text |
| #573571 text on black | 2.15:1 | Fails | Lc -10.0 | 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 900.
-
Step 50
50
#F7F4FB
oklch(97.1% 0.01 305.4)
-
Step 100
100
#EEE6F6
oklch(93.6% 0.023 308.2)
-
Step 200
200
#E1D2F0
oklch(88.5% 0.044 307.9)
-
Step 300
300
#CFB3E8
oklch(80.8% 0.079 308.6)
-
Step 400
400
#B78ADC
oklch(70.7% 0.125 308.7)
-
Step 500
500
#A56BD2
oklch(63.2% 0.159 308.5)
-
Step 600
600
#9050BF
oklch(55.6% 0.173 308.4)
-
Step 700
700
#7B40A5
oklch(49.2% 0.161 308.6)
-
Step 800
800
#643585
oklch(42.7% 0.133 308.9)
-
Step 900
900 (this color)
#573571
oklch(39.8% 0.104 308.6)
-
Step 950
950
#301C3F
oklch(27% 0.067 309)
#573571 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) | #254273 | 0.082 |
| Deuteranopia (no green cones) | #2F446F | 0.074 |
| Tritanopia (no blue cones) | #533F4E | 0.073 |
| Achromatopsia (no color) | #444444 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573571
#573571
oklch(39.8% 0.104 308.6)
- #365102
#365102
oklch(39.8% 0.103 128.5)
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 #573571, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.052
- Blueberry #464196 ΔE 0.070
- Rebecca Purple #663399 ΔE 0.072
- Twilight #4E518B ΔE 0.080
- Grape Purple #5D1451 ΔE 0.081
- Dusk #4E5481 ΔE 0.084
- Dusty Grape #545775 ΔE 0.095
- Purple Brown #673A3F ΔE 0.096
Use #573571 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.