#573B6A
Closest named color: Dark Slate Blue (#483D8B). oklch(40.5% 0.083 310.5), rgb(87, 59, 106).
Aa
White text reads best on this color (9.37:1).
About this color
#573B6A is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.083 and its hue 311°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.061 away. White text reads best on it, at 9.37:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.083) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.23:1 |
| White text | 9.37:1 |
Values
| HEX | #573B6A |
| RGB | rgb(87, 59, 106) |
| HSL | hsl(276, 28%, 32%) |
| OKLCH | oklch(40.5% 0.083 310.5) |
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 #573B6A | 9.37:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #573B6A | 2.23:1 | Fails | Lc 12.4 | Not readable |
| #573B6A text on white | 9.37:1 | AAA | Lc 91.5 | Preferred for body text |
| #573B6A text on black | 2.23:1 | Fails | Lc -10.8 | 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
#CAB8D8
oklch(80.8% 0.048 310.4)
-
Step 400
400
#B093C5
oklch(70.7% 0.078 310.7)
-
Step 500
500
#9C78B6
oklch(63.1% 0.099 310.3)
-
Step 600
600
#8760A2
oklch(55.6% 0.108 310.4)
-
Step 700
700
#734F8B
oklch(49.2% 0.101 310.7)
-
Step 800
800 (this color)
#573B6A
oklch(40.5% 0.083 310.5)
-
Step 900
900
#4C375B
oklch(37.6% 0.065 310.3)
-
Step 950
950
#2D2135
oklch(27.1% 0.04 311.2)
#573B6A 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) | #31456C | 0.064 |
| Deuteranopia (no green cones) | #384769 | 0.059 |
| Tritanopia (no blue cones) | #55424D | 0.059 |
| Achromatopsia (no color) | #464646 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B6A
#573B6A
oklch(40.5% 0.083 310.5)
- #39521E
#39521E
oklch(40.5% 0.083 130.8)
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 #573B6A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.061
- Dusk #4E5481 ΔE 0.072
- Twilight #4E518B ΔE 0.073
- Blueberry #464196 ΔE 0.078
- Dusty Grape #545775 ΔE 0.078
- Purple Brown #673A3F ΔE 0.078
- Brownish Purple #76424E ΔE 0.083
- Dark Grey Blue #29465B ΔE 0.084
Use #573B6A 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.