Add sky colours

- colours will change later

src/components/blog/Background.astro

···
   }
 
   #background[data-time="day"] {
+    background-color: dodgerblue;
+
     #sun,
     #clouds {
       display: block;
···
   }
 
   #background[data-time="night"] {
+    background-color: black;
+
     #stars,
     #moon {
       display: block;