feat: add change background of nixos icon

astal/icons/nixos-3.svg

@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128"><path fill="#7EBAE4" d="M50.732 43.771L20.525 96.428l-7.052-12.033 8.14-14.103-16.167-.042L2 64.237l3.519-6.15 23.013.073 8.27-14.352 13.93-.037zm2.318 42.094l60.409.003-6.827 12.164-16.205-.045 8.047 14.115-3.45 6.01-7.05.008-11.445-20.097-16.483-.034-6.996-12.124zm35.16-23.074l-30.202-52.66L71.888 10l8.063 14.148 8.12-14.072 6.897.002 3.532 6.143-11.57 20.024 8.213 14.386-6.933 12.16z" clip-rule="evenodd" fill-rule="evenodd"/><path fill="#5277C3" d="M39.831 65.463l30.202 52.66-13.88.131-8.063-14.148-8.12 14.072-6.897-.002-3.532-6.143 11.57-20.024-8.213-14.386 6.933-12.16zm35.08-23.207l-60.409-.003L21.33 30.09l16.204.045-8.047-14.115 3.45-6.01 7.051-.01 11.444 20.097 16.484.034 6.996 12.124zm2.357 42.216l30.207-52.658 7.052 12.034-8.141 14.102 16.168.043L126 64.006l-3.519 6.15-23.013-.073-8.27 14.352-13.93.037z" clip-rule="evenodd" fill-rule="evenodd"/></svg>

astal/style.scss

@@ -34,7 +34,7 @@ window.Bar {
   .nix-icon {
     font-size: 24px;
     padding: 0 2px;
-    background-color: #4169e1;
+    background-color: #003366;
     border-top-right-radius: 4px;
     border: none;
   }

astal/widget/Bar.tsx

@@ -140,7 +140,7 @@ export default function Bar(gdkmonitor: Gdk.Monitor) {
     <centerbox>
       <box hexpand halign={Gtk.Align.START} >
         <box className="nix-icon">
-          <icon icon="nixos-2" />
+          <icon icon="nixos-3" />
         </box>
         <Workspaces />
       </box>