package 
{
	import flash.display.Sprite;
	
	public class Main extends Sprite 
	{
		//黒色
		private var color1:Number = 0x000000;
		//赤色
		private var color2:Number = 0xff0000;
		
		public function Main():void 
		{
			init();
		}
		
		private function init():void 
		{
			var sp:Sprite = new Sprite();
			
			//赤と黒の中間色
			var mixColor:Number = setMiddleColor(color1, color2);
			
			sp.graphics.beginFill(mixColor);
			sp.graphics.drawRect(0, 0, 100, 100);
			sp.graphics.endFill();
			addChild(sp);
			
		}
		private function hex2rgb(n:Number):Array 
		{
			var rgbArray:Array = new Array(3);
			rgbArray[0] = (n >> 16) & 0xff;
			rgbArray[1] = (n >> 8) & 0xff;
			rgbArray[2] = n & 0xff;
			return rgbArray;
		}
		
		private function setMiddleColor(firstColor:Number, secondColor:Number):uint
		{
			var firstRGB:Array = hex2rgb(firstColor);
			var secondRGB:Array = hex2rgb(secondColor);
			var red:Number = int((firstRGB[0] + secondRGB[0]) * 0.5);
			var green:Number = int((firstRGB[1] + secondRGB[1]) * 0.5);
			var blue:Number = int((firstRGB[2] + secondRGB[2]) * 0.5);
			var hex:uint = red << 16 | green << 8 | blue;
			return hex;
		}
	}
	
}