Randomize gem color

src/resources/map.rs

@@ -15,6 +15,7 @@ pub struct Map {
     tile_content: Vec<Option<Entity>>,
     border_fg: RGB,
     border_bg: RGB,
+    gem_color: RGB,
 }
 
 impl BaseMap for Map {}
@@ -39,6 +40,7 @@ impl Map {
             tile_content: vec![None; MAP_SIZE],
             border_fg: RGB::named(vga::get_by_index(rng.range(8, 15))),
             border_bg: RGB::named(vga::get_by_index(rng.range(1, 7) as usize)),
+            gem_color: RGB::named(vga::get_by_index(rng.range(1, 15))),
         }
     }
 
@@ -204,7 +206,11 @@ impl Map {
             ctx.set(
                 x + MAP_X,
                 y + MAP_Y,
-                data.color_fg,
+                if *tile == TileType::Gem {
+                    self.gem_color
+                } else {
+                    RGB::named(data.color_fg)
+                },
                 data.color_bg,
                 data.glyph,
             );