code: public void setColor(float r, float g, float b, float a) {
  		color.set(r, g, b, a);
  		colorF = color.toFloatBits();
  		if (staticLight) dirty = true;
  	}
docs: Sets light color
  
  <p>NOTE: you can also use colorless light with shadows, e.g. (0,0,0,1)
  
  @param r
  lights color red component
  @param g
  lights color green component
  @param b
  lights color blue component
  @param a
  lights shadow intensity
  
  @see #setColor(Color)