#573B65
Closest named color: Dark Slate Blue (#483D8B). oklch(40.2% 0.076 313.8), rgb(87, 59, 101).
Aa
White text reads best on this color (9.46:1).
About this color
#573B65 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.076 and its hue 314°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.069 away. White text reads best on it, at 9.46:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.076) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.21:1 |
| White text | 9.46:1 |
Values
| HEX | #573B65 |
| RGB | rgb(87, 59, 101) |
| HSL | hsl(280, 26%, 31%) |
| OKLCH | oklch(40.2% 0.076 313.8) |
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 #573B65 | 9.46:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #573B65 | 2.21:1 | Fails | Lc 12.2 | Not readable |
| #573B65 text on white | 9.46:1 | AAA | Lc 91.8 | Preferred for body text |
| #573B65 text on black | 2.21:1 | Fails | Lc -10.6 | 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
#F7F4F9
oklch(97.1% 0.007 312.3)
-
Step 100
100
#EEE7F2
oklch(93.7% 0.016 313.6)
-
Step 200
200
#E1D3E8
oklch(88.4% 0.032 314.7)
-
Step 300
300
#CEB6DB
oklch(80.8% 0.057 313.8)
-
Step 400
400
#B590C9
oklch(70.7% 0.091 313.5)
-
Step 500
500
#A373BB
oklch(63.1% 0.117 313.9)
-
Step 600
600
#8E5AA7
oklch(55.6% 0.128 314)
-
Step 700
700
#794A8F
oklch(49.2% 0.118 314.2)
-
Step 800
800
#623D74
oklch(42.7% 0.097 313.9)
-
Step 900
900 (this color)
#573B65
oklch(40.2% 0.076 313.8)
-
Step 950
950
#2F1F37
oklch(27% 0.048 313.9)
#573B65 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) | #344467 | 0.060 |
| Deuteranopia (no green cones) | #3A4764 | 0.057 |
| Tritanopia (no blue cones) | #56414B | 0.053 |
| Achromatopsia (no color) | #464646 | 0.077 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B65
#573B65
oklch(40.2% 0.076 313.8)
- #375124
#375124
oklch(40.2% 0.076 133.5)
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 #573B65, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.069
- Purple Brown #673A3F ΔE 0.070
- Dusk #4E5481 ΔE 0.075
- Twilight #4E518B ΔE 0.078
- Dusty Grape #545775 ΔE 0.079
- Brownish Purple #76424E ΔE 0.079
- Dark Grey Blue #29465B ΔE 0.081
- Charcoal Grey #3C4142 ΔE 0.084
Use #573B65 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.