Border highlight rework (#385)

## Description:

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

## Please put your Discord username so you can be contacted if a bug or
regression is found:

Readix

src/core/configuration/PastelTheme.ts

@@ -86,10 +86,10 @@ export const pastelTheme = new (class implements Theme {
   }
 
   focusedBorderColor(): Colord {
-    return colord({ r: 255, g: 255, b: 255 });
+    return colord({ r: 230, g: 230, b: 230 });
   }
   focusedDefendedBorderColor(): Colord {
-    return colord({ r: 215, g: 215, b: 215 });
+    return colord({ r: 200, g: 200, b: 200 });
   }
 
   terrainColor(gm: GameMap, tile: TileRef): Colord {