object-c converts RGB colors into hexadecimal HTML colors_html/css_WEB-ITnose

-(void)color:(NSString *) red andGreen:(NSString*) green andBule:(NSString*) bule{    NSInteger Red = [red integerValue];    NSInteger Green = [green integerValue];    NSInteger Bule = [bule integerValue];    NSInteger colorsize = Red<<16 | Green << 8 | Bule;    NSString * Color = [NSString stringWithFormat:@"#%06lx",colorsize];    NSLog(@"%li",(long)colorsize);    NSLog(@"Color = %@",Color);}