#573B70
Closest named color: Dark Slate Blue (#483D8B). oklch(40.8% 0.091 307.2), rgb(87, 59, 112).
Aa
White text reads best on this color (9.27:1).
About this color
#573B70 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.091 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 0.052 away. White text reads best on it, at 9.27:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.091) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.26:1 |
| White text | 9.27:1 |
Values
| HEX | #573B70 |
| RGB | rgb(87, 59, 112) |
| HSL | hsl(272, 31%, 34%) |
| OKLCH | oklch(40.8% 0.091 307.2) |
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 #573B70 | 9.27:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #573B70 | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #573B70 text on white | 9.27:1 | AAA | Lc 91.2 | Preferred for body text |
| #573B70 text on black | 2.26:1 | Fails | Lc -11.1 | 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
#CAB8DC
oklch(80.9% 0.054 307.7)
-
Step 400
400
#AF93CA
oklch(70.8% 0.084 307.5)
-
Step 500
500
#9B77BD
oklch(63.1% 0.109 307.1)
-
Step 600
600
#865FA9
oklch(55.7% 0.118 307.3)
-
Step 700
700
#714E91
oklch(49.1% 0.11 306.9)
-
Step 800
800 (this color)
#573B70
oklch(40.8% 0.091 307.2)
-
Step 900
900
#4C375F
oklch(37.8% 0.071 307.5)
-
Step 950
950
#2C2038
oklch(26.9% 0.046 306.5)
#573B70 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) | #2E4672 | 0.068 |
| Deuteranopia (no green cones) | #35476F | 0.062 |
| Tritanopia (no blue cones) | #534450 | 0.067 |
| Achromatopsia (no color) | #474747 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B70
#573B70
oklch(40.8% 0.091 307.2)
- #3C5314
#3C5314
oklch(40.9% 0.092 127.5)
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 #573B70, 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
- Twilight #4E518B ΔE 0.068
- Blueberry #464196 ΔE 0.069
- Dusk #4E5481 ΔE 0.070
- Rebecca Purple #663399 ΔE 0.077
- Dusty Grape #545775 ΔE 0.079
- Purple Brown #673A3F ΔE 0.088
- Dark Grey Blue #29465B ΔE 0.089
Use #573B70 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.