sisyphus/config/waybar/transparent.css

/*
 * ~/.config/waybar/transparent.css
 *
 * This stylesheet is a minimalistic, transparent style.
 */

@define-color transparent-black-light rgba(23, 23, 23, 0.7);

window#waybar {
    color: @white; 
    background-color: transparent;
}

.toggle .modules-right {
    background-color: @transparent-black-light;
}

#workspaces button:hover, 
#workspaces button.focused, 
#mode {
    box-shadow: inset 0 2px #ffffff;
}