#573B63
Closest named color: Purple Brown (#673A3F). oklch(40.1% 0.074 315.3), rgb(87, 59, 99).
Aa
White text reads best on this color (9.49:1).
About this color
#573B63 is a dark, moderately saturated purple. In OKLCH its lightness is 40%, its chroma 0.074 and its hue 315°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Purple Brown (#673A3F), ΔE 0.067 away. White text reads best on it, at 9.49:1.
| Hue family | Purples |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.074) |
| Temperature | in between |
| Nearest name | Purple Brown (#673A3F) |
| Black text | 2.21:1 |
| White text | 9.49:1 |
Values
| HEX | #573B63 |
| RGB | rgb(87, 59, 99) |
| HSL | hsl(282, 25%, 31%) |
| OKLCH | oklch(40.1% 0.074 315.3) |
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 #573B63 | 9.49:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #573B63 | 2.21:1 | Fails | Lc 12.1 | Not readable |
| #573B63 text on white | 9.49:1 | AAA | Lc 91.9 | Preferred for body text |
| #573B63 text on black | 2.21:1 | Fails | Lc -10.5 | 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
#EEE7F1
oklch(93.6% 0.015 316)
-
Step 200
200
#E1D3E7
oklch(88.4% 0.031 315.9)
-
Step 300
300
#CFB6D9
oklch(80.9% 0.056 316.3)
-
Step 400
400
#B690C7
oklch(70.8% 0.089 315.2)
-
Step 500
500
#A373B8
oklch(63% 0.113 315.1)
-
Step 600
600
#8E5BA4
oklch(55.6% 0.122 315.1)
-
Step 700
700
#794A8C
oklch(49% 0.114 315.6)
-
Step 800
800
#623D72
oklch(42.6% 0.095 315)
-
Step 900
900 (this color)
#573B63
oklch(40.1% 0.074 315.3)
-
Step 950
950
#2F1F36
oklch(27% 0.047 315.2)
#573B63 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) | #354465 | 0.059 |
| Deuteranopia (no green cones) | #3B4662 | 0.055 |
| Tritanopia (no blue cones) | #56404A | 0.049 |
| Achromatopsia (no color) | #464646 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B63
#573B63
oklch(40.1% 0.074 315.3)
- #365127
#365127
oklch(40.2% 0.074 135.3)
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 #573B63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Purple Brown #673A3F ΔE 0.067
- Dark Slate Blue #483D8B ΔE 0.072
- Dusk #4E5481 ΔE 0.077
- Brownish Purple #76424E ΔE 0.077
- Dusty Grape #545775 ΔE 0.079
- Dark Grey Blue #29465B ΔE 0.079
- Twilight #4E518B ΔE 0.080
- Charcoal Grey #3C4142 ΔE 0.081
Use #573B63 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.