#573B87
Closest named color: Dark Slate Blue (#483D8B). oklch(42.3% 0.123 297.9), rgb(87, 59, 135).
Aa
White text reads best on this color (8.82:1).
About this color
#573B87 is a dark, moderately saturated purple. In OKLCH its lightness is 42%, its chroma 0.123 and its hue 298°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.027 away. White text reads best on it, at 8.82:1.
| Hue family | Purples |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.123) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.38:1 |
| White text | 8.82:1 |
Values
| HEX | #573B87 |
| RGB | rgb(87, 59, 135) |
| HSL | hsl(262, 39%, 38%) |
| OKLCH | oklch(42.3% 0.123 297.9) |
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 #573B87 | 8.82:1 | AAA | Lc -94.4 | Preferred for body text |
| Black text on #573B87 | 2.38:1 | Fails | Lc 14.1 | Not readable |
| #573B87 text on white | 8.82:1 | AAA | Lc 89.9 | Fine for body text |
| #573B87 text on black | 2.38:1 | Fails | Lc -12.4 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F6
oklch(93.5% 0.021 298.2)
-
Step 200
200
#DCD4F1
oklch(88.5% 0.04 298.2)
-
Step 300
300
#C6B7EA
oklch(80.9% 0.073 298.2)
-
Step 400
400
#A990DF
oklch(70.6% 0.116 297.9)
-
Step 500
500
#9573D6
oklch(63.1% 0.147 297.9)
-
Step 600
600
#8059C3
oklch(55.5% 0.16 298)
-
Step 700
700
#6C49A8
oklch(49.1% 0.147 297.7)
-
Step 800
800 (this color)
#573B87
oklch(42.3% 0.123 297.9)
-
Step 900
900
#48346D
oklch(37.6% 0.096 297.8)
-
Step 950
950
#2A1F40
oklch(27% 0.061 297.6)
#573B87 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) | #1B4A8A | 0.084 |
| Deuteranopia (no green cones) | #244A85 | 0.079 |
| Tritanopia (no blue cones) | #4C4A5B | 0.095 |
| Achromatopsia (no color) | #4A4A4A | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B87
#573B87
oklch(42.3% 0.123 297.9)
- #495400
#495400
oklch(42.1% 0.098 118.1)
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 #573B87, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.027
- Blueberry #464196 ΔE 0.039
- Rebecca Purple #663399 ΔE 0.044
- Twilight #4E518B ΔE 0.058
- Dusk #4E5481 ΔE 0.071
- Cobalt #1E488F ΔE 0.081
- Dusk Blue #26538D ΔE 0.086
- Dusty Grape #545775 ΔE 0.089
Use #573B87 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.