Cambiar color flash

Código Flash

The best way would be to use a MC as your background, then you can change the MC's color by using the color object: 
on (release) { 
myColor=new Color(background); 
myColor.setRGB(0xFF3366); 
} 
This action is placed on a button. If you wanted to alter the color automatically then place the action in a frame: 
myColor=new Color(background); 
myColor.setRGB(0xFF3366); 
Both of these actions target the MC named 'background'.