Pantone codes are universal accepted color codes for each color of your logo. By providing the Pantone code, we can match the the exact colors while printing.
Pantone codes are available in Pantone books and the same books are used world wide, so even if the production is done is china, they too use the same Pantone codes.
Matching the colors based on the monitor is not a good way as the monitor resolution will be different from what the client sees and what our production guys sees on his monitor.
The best way is Pantone codes, if you do not have the Pantone codes, we can help you bring the pantone book and you can choose your pantone codes.