#573B6D
Closest named color: Dark Slate Blue (#483D8B). oklch(40.6% 0.087 308.8), rgb(87, 59, 109).
Aa
White text reads best on this color (9.32:1).
About this color
#573B6D is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.087 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 0.056 away. White text reads best on it, at 9.32:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.087) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.25:1 |
| White text | 9.32:1 |
Values
| HEX | #573B6D |
| RGB | rgb(87, 59, 109) |
| HSL | hsl(274, 30%, 33%) |
| OKLCH | oklch(40.6% 0.087 308.8) |
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 #573B6D | 9.32:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #573B6D | 2.25:1 | Fails | Lc 12.6 | Not readable |
| #573B6D text on white | 9.32:1 | AAA | Lc 91.4 | Preferred for body text |
| #573B6D text on black | 2.25:1 | Fails | Lc -11.0 | 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
#EDE7F2
oklch(93.6% 0.016 310.1)
-
Step 200
200
#DED4E8
oklch(88.4% 0.029 308.1)
-
Step 300
300
#CAB8DA
oklch(80.8% 0.051 309)
-
Step 400
400
#AF93C8
oklch(70.7% 0.082 308.4)
-
Step 500
500
#9C77B9
oklch(63% 0.105 309.3)
-
Step 600
600
#865FA5
oklch(55.5% 0.113 308.8)
-
Step 700
700
#724E8E
oklch(49% 0.106 308.9)
-
Step 800
800 (this color)
#573B6D
oklch(40.6% 0.087 308.8)
-
Step 900
900
#4C375D
oklch(37.7% 0.068 308.8)
-
Step 950
950
#2C2036
oklch(26.8% 0.043 308.7)
#573B6D 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) | #30466F | 0.066 |
| Deuteranopia (no green cones) | #37476C | 0.060 |
| Tritanopia (no blue cones) | #54434E | 0.064 |
| Achromatopsia (no color) | #474747 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B6D
#573B6D
oklch(40.6% 0.087 308.8)
- #3B5219
#3B5219
oklch(40.6% 0.087 128.5)
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 #573B6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.056
- Twilight #4E518B ΔE 0.070
- Dusk #4E5481 ΔE 0.071
- Blueberry #464196 ΔE 0.073
- Dusty Grape #545775 ΔE 0.078
- Rebecca Purple #663399 ΔE 0.081
- Purple Brown #673A3F ΔE 0.083
- Dark Grey Blue #29465B ΔE 0.086
Use #573B6D 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.