#573F83
Closest named color: Dark Slate Blue (#483D8B). oklch(42.7% 0.111 297.8), rgb(87, 63, 131).
Aa
White text reads best on this color (8.59:1).
About this color
#573F83 is a dark, moderately saturated purple. In OKLCH its lightness is 43%, its chroma 0.111 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 0.031 away. White text reads best on it, at 8.59:1.
| Hue family | Purples |
| Lightness | dark (43%) |
| Chroma | moderately saturated (0.111) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.44:1 |
| White text | 8.59:1 |
Values
| HEX | #573F83 |
| RGB | rgb(87, 63, 131) |
| HSL | hsl(261, 35%, 38%) |
| OKLCH | oklch(42.7% 0.111 297.8) |
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 #573F83 | 8.59:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #573F83 | 2.44:1 | Fails | Lc 14.7 | Not readable |
| #573F83 text on white | 8.59:1 | AAA | Lc 89.3 | Fine for body text |
| #573F83 text on black | 2.44:1 | Fails | Lc -12.9 | 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
#DBD5EE
oklch(88.5% 0.035 296.7)
-
Step 300
300
#C5B8E6
oklch(80.9% 0.065 297.9)
-
Step 400
400
#A892D9
oklch(70.6% 0.104 297.9)
-
Step 500
500
#9376CF
oklch(63.1% 0.133 297.5)
-
Step 600
600
#7E5DBB
oklch(55.5% 0.143 297.8)
-
Step 700
700
#6B4CA2
oklch(49.1% 0.135 297.9)
-
Step 800
800 (this color)
#573F83
oklch(42.7% 0.111 297.8)
-
Step 900
900
#473669
oklch(37.6% 0.086 297.5)
-
Step 950
950
#2A203E
oklch(27.1% 0.055 298)
#573F83 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) | #274C85 | 0.072 |
| Deuteranopia (no green cones) | #2D4B81 | 0.067 |
| Tritanopia (no blue cones) | #4E4C5B | 0.086 |
| Achromatopsia (no color) | #4C4C4C | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573F83
#573F83
oklch(42.7% 0.111 297.8)
- #4B5600
#4B5600
oklch(42.8% 0.1 117.9)
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 #573F83, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.031
- Blueberry #464196 ΔE 0.042
- Twilight #4E518B ΔE 0.049
- Rebecca Purple #663399 ΔE 0.053
- Dusk #4E5481 ΔE 0.059
- Dusty Grape #545775 ΔE 0.077
- Cobalt #1E488F ΔE 0.079
- Dusk Blue #26538D ΔE 0.079
Use #573F83 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.