nixos-config/home-manager/config/waybar/style.css

* {
  /* `otf-font-awesome` is required to be installed for icons */
  font-family: FontAwesome, Fira Sans, sans-serif;
  font-size: 12px;
  padding-left: 5px;
  padding-right: 5px;
}

window#waybar {
  /*background-color: rgba(43, 48, 59, 0.5);*/
  background-color: rgba(51, 2, 47, 0.6);
  border: 0px;
  border-top: 2px solid rgba(93, 4, 86, 0.8);
  /*border-bottom: 3px solid rgba(100, 114, 125, 0.5);*/
  color: #f2daf0;
  /*color: #ffffff;*/
  transition-property: background-color;
  transition-duration: 0.5s;
}

window#waybar.hidden {
  opacity: 0.2;
}

/*
window#waybar.empty {
    background-color: transparent;
}
window#waybar.solo {
    background-color: #FFFFFF;
}
*/

button {
  /* Use box-shadow instead of border so the text isn't offset */
  box-shadow: inset 0 -3px transparent;
  /* Avoid rounded borders under each button name */
  border: none;
  border-radius: 0;
}

/* https://github.com/Alexays/Waybar/wiki/FAQ#the-workspace-buttons-have-a-strange-hover-effect */
button:hover {
  background: inherit;
  box-shadow: inset 0 -3px #ffffff;
}

#workspaces button {
  padding: 0 5px;
  background-color: transparent;
  color: #ffffff;
}

#workspaces button:hover {
  background: rgba(0, 0, 0, 0.2);
}

#workspaces button.focused {
  background-color: #64727d;
  box-shadow: inset 0 -3px #ffffff;
}

#workspaces button.urgent {
  background-color: #eb4d4b;
}

#mode {
  background-color: #64727d;
  border-bottom: 3px solid #ffffff;
}

#clock,
#battery,
#tray,
#mode,
#idle_inhibitor,
#window,
#workspaces {
  margin: 0 4px;
}

/* If workspaces is the leftmost module, omit left margin */
.modules-left > widget:first-child > #workspaces {
  margin-left: 0;
}

/* If workspaces is the rightmost module, omit right margin */
.modules-right > widget:last-child > #workspaces {
  margin-right: 0;
}

#clock {
  background-color: #5d0456;
}

#battery {
  background-color: #5d0456;
  color: #f2daf0;
  /*color: #000000;*/
}

@keyframes blink {
  to {
    background-color: #f2daf0;
    color: #000000;
  }
}

#battery.critical:not(.charging) {
  background-color: #ca3232;
  color: #f2daf0;
  animation-name: blink;
  animation-duration: 0.5s;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-direction: alternate;
}

label:focus {
  background-color: #000000;
}

/*
#tray {
  background-color: #2980b9;
}

#tray > .passive {
  -gtk-icon-effect: dim;
}

#tray > .needs-attention {
  -gtk-icon-effect: highlight;
  background-color: #eb4d4b;
}
*/

#idle_inhibitor {
  background-color: #5d0456;
}

#idle_inhibitor.activated {
  background-color: #f2daf0;
  color: #5d0456;
}