#573F85
Closest named color: Dark Slate Blue (#483D8B). oklch(42.9% 0.113 297.2), rgb(87, 63, 133).
Aa
White text reads best on this color (8.55:1).
About this color
#573F85 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.113 and its hue 297°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.029 away. White text reads best on it, at 8.55:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.113) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.45:1 |
| White text | 8.55:1 |
Values
| HEX | #573F85 |
| RGB | rgb(87, 63, 133) |
| HSL | hsl(261, 36%, 38%) |
| OKLCH | oklch(42.9% 0.113 297.2) |
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 #573F85 | 8.55:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #573F85 | 2.45:1 | Fails | Lc 14.8 | Not readable |
| #573F85 text on white | 8.55:1 | AAA | Lc 89.2 | Fine for body text |
| #573F85 text on black | 2.45:1 | Fails | Lc -13.0 | 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
#F6F4FB
oklch(97.1% 0.009 299.2)
-
Step 100
100
#EBE7F5
oklch(93.5% 0.019 299.1)
-
Step 200
200
#DBD5EF
oklch(88.6% 0.036 296.2)
-
Step 300
300
#C5B8E7
oklch(80.9% 0.067 297.6)
-
Step 400
400
#A892DB
oklch(70.7% 0.107 297.5)
-
Step 500
500
#9376D1
oklch(63.2% 0.136 297)
-
Step 600
600
#7E5DBE
oklch(55.7% 0.147 297.1)
-
Step 700
700
#6A4CA4
oklch(49.1% 0.137 296.8)
-
Step 800
800 (this color)
#573F85
oklch(42.9% 0.113 297.2)
-
Step 900
900
#47366A
oklch(37.7% 0.088 297.1)
-
Step 950
950
#2A203E
oklch(27.1% 0.055 298)
#573F85 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) | #254D87 | 0.075 |
| Deuteranopia (no green cones) | #2B4B83 | 0.069 |
| Tritanopia (no blue cones) | #4D4D5C | 0.089 |
| Achromatopsia (no color) | #4C4C4C | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F85
#573F85
oklch(42.9% 0.113 297.2)
- #4C5600
#4C5600
oklch(42.9% 0.099 117.2)
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 #573F85, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.029
- Blueberry #464196 ΔE 0.040
- Twilight #4E518B ΔE 0.048
- Rebecca Purple #663399 ΔE 0.050
- Dusk #4E5481 ΔE 0.060
- Dusty Grape #545775 ΔE 0.078
- Cobalt #1E488F ΔE 0.079
- Dusk Blue #26538D ΔE 0.079
Use #573F85 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.