#include<stdio.h>

void main (void)
{
	int red = -1;
	int green = -1;
	int blue = -1;

	while ((red < 0) || (red > 255))
	{
		printf("Red Value   (0-255): ");
		scanf("%d", &red);
	}
	while ((green < 0) || (green > 255))
	{
		printf("Green Value (0-255): ");
		scanf("%d", &green);
	}
	while ((blue < 0) || (blue > 255))
	{
		printf("Blue Value  (0-255): ");
		scanf("%d", &blue);
	}

	printf("\nHex Code: #");
	printf("%02x%02x%02x\n", red, green, blue);
}