nih-plug/nih_plug_vizia/assets/theme.css

/* Default styling for the widgets included in nih_plug_vizia */

param-slider {
  height: 30px;
  width: 180px;
  border-color: #0a0a0a;
  border-width: 1px;
  background-color: transparent;
  transition: background-color 0.1 0;
}

/* Vizia doesn't support commas in selectors */
/* Also, WTB Sass */
param-slider:active {
  background-color: #8080801a;
  transition: background-color 0.1 0;
}
param-slider:hover {
  background-color: #8080801a;
  transition: background-color 0.1 0;
}

param-slider .fill {
  background-color: #c4c4c4;
}

/* This is a textbox, but we want it to appear just like the label */
param-slider .value-entry {
  /* Vizia doesn't support the unset value */
  background-color: transparent;
  border-width: 0px;
}