Fix bug with pipe color (#30645)

Co-authored-by: ArtisticRoomba <145879011+ArtisticRoomba@users.noreply.github.com>

Content.Shared/Atmos/EntitySystems/AtmosPipeColorSystem.cs

@@ -0,0 +1,36 @@
+using Content.Shared.Atmos.Components;
+using Content.Shared.Atmos.Piping;
+
+namespace Content.Shared.Atmos.EntitySystems;
+
+public sealed class AtmosPipeColorSystem : EntitySystem
+{
+
+    [Dependency] private readonly SharedAppearanceSystem _appearance = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<AtmosPipeColorComponent, ComponentStartup>(OnStartup);
+        SubscribeLocalEvent<AtmosPipeColorComponent, ComponentShutdown>(OnShutdown);
+    }
+
+    private void OnStartup(Entity<AtmosPipeColorComponent> item, ref ComponentStartup args)
+    {
+        _appearance.SetData(item.Owner, PipeColorVisuals.Color, item.Comp.Color);
+    }
+
+    private void OnShutdown(Entity<AtmosPipeColorComponent> item, ref ComponentShutdown args)
+    {
+        _appearance.SetData(item.Owner, PipeColorVisuals.Color, Color.White);
+    }
+
+    public void SetColor(Entity<AtmosPipeColorComponent> item, Color color)
+    {
+        item.Comp.Color = color;
+        _appearance.SetData(item.Owner, PipeColorVisuals.Color, color);
+        Dirty(item);
+    }
+}
+