#573778
Closest named color: Dark Slate Blue (#483D8B). oklch(40.6% 0.109 304.7), rgb(87, 55, 120).
Aa
White text reads best on this color (9.44:1).
About this color
#573778 is a dark, moderately saturated purple. In OKLCH its lightness is 41%, its chroma 0.109 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 0.042 away. White text reads best on it, at 9.44:1.
| Hue family | Purples |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.109) |
| Temperature | in between |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 2.22:1 |
| White text | 9.44:1 |
Values
| HEX | #573778 |
| RGB | rgb(87, 55, 120) |
| HSL | hsl(270, 37%, 34%) |
| OKLCH | oklch(40.6% 0.109 304.7) |
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 #573778 | 9.44:1 | AAA | Lc -95.9 | Preferred for body text |
| Black text on #573778 | 2.22:1 | Fails | Lc 12.4 | Not readable |
| #573778 text on white | 9.44:1 | AAA | Lc 91.6 | Preferred for body text |
| #573778 text on black | 2.22:1 | Fails | Lc -10.8 | 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
#ECE7F4
oklch(93.6% 0.018 303.4)
-
Step 200
200
#DED4ED
oklch(88.6% 0.036 303.8)
-
Step 300
300
#CAB7E2
oklch(80.9% 0.063 305.1)
-
Step 400
400
#AF90D4
oklch(70.6% 0.102 304.8)
-
Step 500
500
#9C73C9
oklch(63.1% 0.132 304.9)
-
Step 600
600
#875AB5
oklch(55.6% 0.142 305.1)
-
Step 700
700
#724A9C
oklch(49.1% 0.131 304.5)
-
Step 800
800 (this color)
#573778
oklch(40.6% 0.109 304.7)
-
Step 900
900
#4C3566
oklch(37.8% 0.085 304.3)
-
Step 950
950
#2C1F3C
oklch(27% 0.055 303.6)
#573778 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) | #22457A | 0.083 |
| Deuteranopia (no green cones) | #2C4676 | 0.075 |
| Tritanopia (no blue cones) | #514352 | 0.081 |
| Achromatopsia (no color) | #464646 | 0.110 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #573778
#573778
oklch(40.6% 0.109 304.7)
- #3D5200
#3D5200
oklch(40.6% 0.102 124.8)
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 #573778, 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
- Rebecca Purple #663399 ΔE 0.062
- Twilight #4E518B ΔE 0.071
- Dusk #4E5481 ΔE 0.078
- Dusty Grape #545775 ΔE 0.091
- Cobalt #1E488F ΔE 0.091
- Grape Purple #5D1451 ΔE 0.091
Use #573778 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.