Example: `webgpu_backdrop_water` - add extra blue (#27455)

examples/webgpu_backdrop_water.html

@@ -112,7 +112,7 @@
 				iceDiffuse.wrapT = THREE.RepeatWrapping;
 				iceDiffuse.colorSpace = THREE.NoColorSpace;
 
-				const iceColorNode = triplanarTexture( texture( iceDiffuse ) );
+				const iceColorNode = triplanarTexture( texture( iceDiffuse ) ).add( color( 0x0066ff ) );
 
 				const geometry = new THREE.IcosahedronGeometry( 1, 3 );
 				const material = new MeshStandardNodeMaterial( { colorNode: iceColorNode } );