This is a piece of a pong-like game I plan on creating.
Material mat_p1 = new Material(assetManager, “Common/MatDefs/Misc/SimpleTextured.j3md”);
mat_p1.setColor(“m_Color”, ColorRGBA.Blue);
paddle1.setMaterial(mat_p1);
paddle1.setLocalTranslation(10.0f, 5.0f, 5.0f);
Material mat_p2 = new Material(assetManager, “Common/MatDefs/Misc/SimpleTextured.j3md”);
mat_p2.setColor(“m_Color”, ColorRGBA.Red);
paddle2.setMaterial(mat_p2);
paddle2.setLocalTranslation(-10.0f, 5.0f, 5.0f);
Material mat_ball = new Material(assetManager, “Common/MatDefs/Misc/SimpleTextured.j3md”);
mat_ball.setColor(“m_Color”, ColorRGBA.White);
ball.setMaterial(mat_ball);
ball.setLocalTranslation(0.0f, 5.0f, 5.0f);
When compiling my program in NetBeans 6.9.1, I get the following error:
“Material parameter is not defined: m_Color”
nvrmind, I was using “SimpleTextured” rather than “SolidColor” 
You know, this very thing has prompted me to almost want to merge all the diffuse color attributes across a set of my own shaders. It gets sorta tricky remembering which “m_Color”, “m_ColorMap” and “m_DiffuseColor” goes with which shader. Sad part is I think I’ve already got it mostly memorized… But oh how many times I’ve looked at those 3 shaders…
Glad you caught your error though, I’m just ranting a little XD
~FlaH