Small optimization of color uniforms setting.

It should be safe just to set material color object references, no more updating of color string in every frame for every material color.

src/renderers/WebGLRenderer.js

@@ -2066,7 +2066,7 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 	function refreshUniformsCommon( uniforms, material ) {
 
-		uniforms.diffuse.value.setRGB( material.color.r, material.color.g, material.color.b );
+		uniforms.diffuse.value = material.color;
 		uniforms.opacity.value = material.opacity;
 		uniforms.map.texture = material.map;
 
@@ -2082,14 +2082,14 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 	function refreshUniformsLine( uniforms, material ) {
 
-		uniforms.diffuse.value.setRGB( material.color.r, material.color.g, material.color.b );
+		uniforms.diffuse.value = material.color;
 		uniforms.opacity.value = material.opacity;
 
 	};
 
 	function refreshUniformsParticle( uniforms, material ) {
 
-		uniforms.psColor.value.setRGB( material.color.r, material.color.g, material.color.b );
+		uniforms.psColor.value = material.color;
 		uniforms.opacity.value = material.opacity;
 		uniforms.size.value = material.size;
 		uniforms.scale.value = _canvas.height / 2.0; // TODO: Cache this.
@@ -2099,7 +2099,7 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 	function refreshUniformsFog( uniforms, fog ) {
 
-		uniforms.fogColor.value.setHex( fog.color.hex );
+		uniforms.fogColor.value = fog.color;
 
 		if ( fog instanceof THREE.Fog ) {
 
@@ -2116,10 +2116,8 @@ THREE.WebGLRenderer = function ( parameters ) {
 
 	function refreshUniformsPhong( uniforms, material ) {
 
-		//uniforms.ambient.value.setHex( material.ambient.hex );
-		//uniforms.specular.value.setHex( material.specular.hex );
-		uniforms.ambient.value.setRGB( material.ambient.r, material.ambient.g, material.ambient.b );
-		uniforms.specular.value.setRGB( material.specular.r, material.specular.g, material.specular.b );
+		uniforms.ambient.value = material.ambient;
+		uniforms.specular.value = material.specular;
 		uniforms.shininess.value = material.shininess;
 
 	};