#573771
Closest named color: Dark Slate Blue (#483D8B). oklch(40.1% 0.1 308), rgb(87, 55, 113).
Aa
White text reads best on this color (9.58:1).
About this color
#573771 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.100 and its hue 308°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.051 away. White text reads best on it, at 9.58:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.100) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.19:1 |
| White text | 9.58:1 |
Values
| HEX | #573771 |
| RGB | rgb(87, 55, 113) |
| HSL | hsl(273, 35%, 33%) |
| OKLCH | oklch(40.1% 0.1 308) |
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 #573771 | 9.58:1 | AAA | Lc -96.3 | Preferred for body text |
| Black text on #573771 | 2.19:1 | Fails | Lc 12.0 | Not readable |
| #573771 text on white | 9.58:1 | AAA | Lc 92.0 | Preferred for body text |
| #573771 text on black | 2.19:1 | Fails | Lc -10.4 | 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
#EEE6F5
oklch(93.6% 0.022 309.6)
-
Step 200
200
#E1D2EF
oklch(88.5% 0.042 308.6)
-
Step 300
300
#CEB4E7
oklch(80.9% 0.076 307.8)
-
Step 400
400
#B58BDA
oklch(70.6% 0.121 308)
-
Step 500
500
#A36DD0
oklch(63.2% 0.153 307.8)
-
Step 600
600
#8E52BD
oklch(55.6% 0.167 307.7)
-
Step 700
700
#7942A3
oklch(49.1% 0.155 307.8)
-
Step 800
800
#623784
oklch(42.7% 0.128 307.6)
-
Step 900
900 (this color)
#573771
oklch(40.1% 0.1 308)
-
Step 950
950
#2F1D3E
oklch(27% 0.063 307.9)
#573771 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) | #284473 | 0.078 |
| Deuteranopia (no green cones) | #314570 | 0.070 |
| Tritanopia (no blue cones) | #53414E | 0.073 |
| Achromatopsia (no color) | #454545 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573771
#573771
oklch(40.1% 0.1 308)
- #385107
#385107
oklch(40% 0.1 127.8)
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 #573771, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.051
- Blueberry #464196 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.073
- Twilight #4E518B ΔE 0.075
- Dusk #4E5481 ΔE 0.079
- Grape Purple #5D1451 ΔE 0.085
- Dusty Grape #545775 ΔE 0.089
- Purple Brown #673A3F ΔE 0.093
Use #573771 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.