#573B77
Closest named color: Dark Slate Blue (#483D8B). oklch(41.2% 0.101 303.9), rgb(87, 59, 119).
Aa
White text reads best on this color (9.14:1).
About this color
#573B77 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.101 and its hue 304°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.042 away. White text reads best on it, at 9.14:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.101) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.29:1 |
| White text | 9.14:1 |
Values
| HEX | #573B77 |
| RGB | rgb(87, 59, 119) |
| HSL | hsl(268, 34%, 35%) |
| OKLCH | oklch(41.2% 0.101 303.9) |
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 #573B77 | 9.14:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #573B77 | 2.29:1 | Fails | Lc 13.1 | Not readable |
| #573B77 text on white | 9.14:1 | AAA | Lc 90.9 | Preferred for body text |
| #573B77 text on black | 2.29:1 | Fails | Lc -11.5 | 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
#DDD4EB
oklch(88.4% 0.033 303.4)
-
Step 300
300
#C8B8E0
oklch(80.9% 0.058 303.3)
-
Step 400
400
#AD92D1
oklch(70.7% 0.095 303.7)
-
Step 500
500
#9976C5
oklch(63.1% 0.121 303.5)
-
Step 600
600
#845DB1
oklch(55.5% 0.131 303.9)
-
Step 700
700
#704C98
oklch(49% 0.122 304.1)
-
Step 800
800 (this color)
#573B77
oklch(41.2% 0.101 303.9)
-
Step 900
900
#4B3663
oklch(37.7% 0.078 304.4)
-
Step 950
950
#2C203A
oklch(27% 0.049 304.5)
#573B77 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) | #2A4779 | 0.072 |
| Deuteranopia (no green cones) | #314875 | 0.067 |
| Tritanopia (no blue cones) | #514653 | 0.077 |
| Achromatopsia (no color) | #484848 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573B77
#573B77
oklch(41.2% 0.101 303.9)
- #405302
#405302
oklch(41.1% 0.1 123.6)
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 #573B77, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.042
- Blueberry #464196 ΔE 0.059
- Twilight #4E518B ΔE 0.063
- Rebecca Purple #663399 ΔE 0.066
- Dusk #4E5481 ΔE 0.068
- Dusty Grape #545775 ΔE 0.080
- Cobalt #1E488F ΔE 0.088
- Dusk Blue #26538D ΔE 0.090
Use #573B77 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.