#573A74
Closest named color: Dark Slate Blue (#483D8B). oklch(40.9% 0.099 305.6), rgb(87, 58, 116).
Aa
White text reads best on this color (9.28:1).
About this color
#573A74 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.099 and its hue 306°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 9.28:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.099) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.26:1 |
| White text | 9.28:1 |
Values
| HEX | #573A74 |
| RGB | rgb(87, 58, 116) |
| HSL | hsl(270, 33%, 34%) |
| OKLCH | oklch(40.9% 0.099 305.6) |
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 #573A74 | 9.28:1 | AAA | Lc -95.6 | Preferred for body text |
| Black text on #573A74 | 2.26:1 | Fails | Lc 12.7 | Not readable |
| #573A74 text on white | 9.28:1 | AAA | Lc 91.2 | Preferred for body text |
| #573A74 text on black | 2.26:1 | Fails | Lc -11.1 | 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
#F7F4FA
oklch(97.1% 0.009 308.4)
-
Step 100
100
#ECE7F3
oklch(93.5% 0.017 304.8)
-
Step 200
200
#DED4EA
oklch(88.5% 0.032 306.2)
-
Step 300
300
#C9B8DF
oklch(80.9% 0.057 304.9)
-
Step 400
400
#AE92CF
oklch(70.7% 0.092 305.1)
-
Step 500
500
#9B76C2
oklch(63.2% 0.117 305.7)
-
Step 600
600
#865DAE
oklch(55.6% 0.128 306)
-
Step 700
700
#714C96
oklch(49% 0.12 305.5)
-
Step 800
800 (this color)
#573A74
oklch(40.9% 0.099 305.6)
-
Step 900
900
#4B3662
oklch(37.7% 0.077 305)
-
Step 950
950
#2C2039
oklch(27% 0.048 305.5)
#573A74 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) | #2A4676 | 0.073 |
| Deuteranopia (no green cones) | #324773 | 0.066 |
| Tritanopia (no blue cones) | #524451 | 0.073 |
| Achromatopsia (no color) | #474747 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573A74
#573A74
oklch(40.9% 0.099 305.6)
- #3D5308
#3D5308
oklch(40.9% 0.099 125.8)
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 #573A74, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Blueberry #464196 ΔE 0.063
- Twilight #4E518B ΔE 0.067
- Rebecca Purple #663399 ΔE 0.070
- Dusk #4E5481 ΔE 0.071
- Dusty Grape #545775 ΔE 0.082
- Cobalt #1E488F ΔE 0.091
- Dusk Blue #26538D ΔE 0.093
Use #573A74 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.