Do you have a color card? If you have a color card you can refer to the color card, if you don't have a color card then I'll tell you neither. The formulas are all based on the basic colors of the color cards.
And if you don't have a color card, you don't even know if the color you match is standard.
Suggestion, if the order is big, don't save this money. It is better to buy a set of color cards.