Was told if i defoliate now it will help bring out the autumn color any thoughts?
Maybe you misunderstood or maybe whoever told you did not understand the concept properly.
Good autumn colour depends on several things. Cold nights to start the process of withdrawing food from the leaves + sunny days to help the process + healthy plants so there are plenty of minerals in the leaves from plenty of food being collected and processed in the leaves.
Defoliating will not help with any of those factors.
Defoliation
can improve autumn colour if the leaves on the tree over summer have been damaged and have brown/black patches. The burnt bits are dead and cannot change colour so the more dead bits on the leaves the less colour you will get. Defoliating at the correct time can allow the tree to replace damaged leaves with fresh, healthy ones. You need to make sure you defoliate early enough for the new leaves to grow, open and mature before the cold starts to initiate colour change and you need to protect the new leaves so they do not become damaged or you will just be back where you started
Defoliating will not give autumn colour if you don't get cold nights and sunny days.