public Colour(int alphaComponent, int redComponent, int greenComponent, int blueComponent){
		if(alphaComponent > 255 || alphaComponent < 0){
			throw new Error("Alpha Component has an invalid value.");
		}
		
		if(redComponent > 255 || redComponent < 0){
			throw new Error("Red Component has an invalid value.");
		}


		if(greenComponent > 255 || greenComponent < 0){
			throw new Error("Green Component has an invalid value.");
		}

		
		if(blueComponent > 255 || blueComponent < 0){
			throw new Error("Blue Component has an invalid value.");
		}
		
		this.alphaComponent = alphaComponent;
		this.redComponent 	= redComponent;
		this.blueComponent 	= blueComponent;
		this.greenComponent = greenComponent;
	}