{
  config,
  accentColour ? "base07",
  ...
}: {
  services.avizo = {
    enable = true;
    settings.default = with config.scheme; let
      accent = {
        r = config.scheme."${accentColour}-rgb-r";
        g = config.scheme."${accentColour}-rgb-g";
        b = config.scheme."${accentColour}-rgb-b";
      };
    in {
      background = "rgba(${base00-rgb-r}, ${base00-rgb-g}, ${base00-rgb-b}, 0.9)";
      bar-bg-color = "rgba(${base00-rgb-r}, ${base00-rgb-g}, ${base00-rgb-b}, 0.9)";
      bar-fg-color = "rgba(${base05-rgb-r}, ${base05-rgb-g}, ${base05-rgb-b}, 1.0)";
      border-color = "rgba(${accent.r}, ${accent.g}, ${accent.b}, 1.0)";
      image-opacity = "1.0";
    };
  };
}