#573B6C
Closest named color: Dark Slate Blue (#483D8B). oklch(40.6% 0.086 309.4), rgb(87, 59, 108).
Aa
White text reads best on this color (9.34:1).
About this color
#573B6C is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.086 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 0.058 away. White text reads best on it, at 9.34:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.086) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.24:1 |
| White text | 9.34:1 |
Values
| HEX | #573B6C |
| RGB | rgb(87, 59, 108) |
| HSL | hsl(274, 29%, 33%) |
| OKLCH | oklch(40.6% 0.086 309.4) |
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 #573B6C | 9.34:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #573B6C | 2.24:1 | Fails | Lc 12.5 | Not readable |
| #573B6C text on white | 9.34:1 | AAA | Lc 91.4 | Preferred for body text |
| #573B6C text on black | 2.24:1 | Fails | Lc -10.9 | 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
#EDE7F1
oklch(93.6% 0.015 312.2)
-
Step 200
200
#DFD4E7
oklch(88.4% 0.028 311.3)
-
Step 300
300
#CAB8DA
oklch(80.8% 0.051 309)
-
Step 400
400
#AF93C7
oklch(70.7% 0.08 308.9)
-
Step 500
500
#9C78B8
oklch(63.2% 0.101 309.5)
-
Step 600
600
#8760A4
oklch(55.7% 0.111 309.6)
-
Step 700
700
#724F8D
oklch(49.2% 0.103 309)
-
Step 800
800 (this color)
#573B6C
oklch(40.6% 0.086 309.4)
-
Step 900
900
#4C375C
oklch(37.6% 0.067 309.5)
-
Step 950
950
#2D2036
oklch(26.9% 0.044 310.7)
#573B6C 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) | #30456E | 0.065 |
| Deuteranopia (no green cones) | #37476B | 0.060 |
| Tritanopia (no blue cones) | #54434E | 0.062 |
| Achromatopsia (no color) | #474747 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B6C
#573B6C
oklch(40.6% 0.086 309.4)
- #3A521B
#3A521B
oklch(40.6% 0.086 129.5)
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 #573B6C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.058
- Twilight #4E518B ΔE 0.071
- Dusk #4E5481 ΔE 0.071
- Blueberry #464196 ΔE 0.075
- Dusty Grape #545775 ΔE 0.078
- Purple Brown #673A3F ΔE 0.081
- Rebecca Purple #663399 ΔE 0.083
- Dark Grey Blue #29465B ΔE 0.085
Use #573B6C 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.