#573B74
Closest named color: Dark Slate Blue (#483D8B). oklch(41% 0.097 305.2), rgb(87, 59, 116).
Aa
White text reads best on this color (9.19:1).
About this color
#573B74 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.097 and its hue 305°. 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 9.19:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.097) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.28:1 |
| White text | 9.19:1 |
Values
| HEX | #573B74 |
| RGB | rgb(87, 59, 116) |
| HSL | hsl(269, 33%, 34%) |
| OKLCH | oklch(41% 0.097 305.2) |
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 #573B74 | 9.19:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #573B74 | 2.28:1 | Fails | Lc 12.9 | Not readable |
| #573B74 text on white | 9.19:1 | AAA | Lc 91.0 | Preferred for body text |
| #573B74 text on black | 2.28:1 | Fails | Lc -11.3 | 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
#F6F4FA
oklch(97% 0.008 301.4)
-
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
#C9B8DE
oklch(80.9% 0.056 305.4)
-
Step 400
400
#AE92CE
oklch(70.7% 0.091 305.5)
-
Step 500
500
#9A76C1
oklch(63% 0.116 305.4)
-
Step 600
600
#855EAE
oklch(55.7% 0.126 305.2)
-
Step 700
700
#714D95
oklch(49.1% 0.117 305.6)
-
Step 800
800 (this color)
#573B74
oklch(41% 0.097 305.2)
-
Step 900
900
#4B3661
oklch(37.6% 0.075 305.6)
-
Step 950
950
#2C2039
oklch(27% 0.048 305.5)
#573B74 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) | #2C4776 | 0.071 |
| Deuteranopia (no green cones) | #334873 | 0.065 |
| Tritanopia (no blue cones) | #524552 | 0.072 |
| Achromatopsia (no color) | #484848 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B74
#573B74
oklch(41% 0.097 305.2)
- #3E530B
#3E530B
oklch(41% 0.097 125.4)
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 #573B74, 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 0.065
- Dusk #4E5481 ΔE 0.069
- Rebecca Purple #663399 ΔE 0.070
- Dusty Grape #545775 ΔE 0.080
- Cobalt #1E488F ΔE 0.090
- Dusk Blue #26538D ΔE 0.091
Use #573B74 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.