MeshPhongMaterial can be tricky because it requires a light source to show the true color. It's likely the mesh is still red, but it just looks dark blue since there's so little light on it.
Try creating a
PointLight and placing it in front of your mesh. Pretty sure that'll brighten it up and show the red color.
Here's some docs to get you going: https://threejs.org/docs/#api/en/lights/PointLight
const light = new THREE.PointLight( 0xff0000, 1, 100 ); light.position.set( 50, 50, 50 ); scene.add( light );
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