Many new players are sometimes confused about using green, blue or purple acc, but let's compare the benefits of green Acc first
Green has the advantage in the price of inexpensive enchance material and a small restoration scroll, from +1 to +10 only requires 1 restoration scroll.
Blue sometimes many players recommend it but blue enhancing material is quite expensive and for restoration scroll increases with increasing levels.
Purple is a fairly expensive accessory in everything, from enchances to many scroll restorations.
For green +10 its recommended because easy enchance, you got CP and All resonance
For blue +8 its recommended because we got some CP and Resonance
For Purple recommended +5 because its so Expensive XD.
I recommended for new player use green acc, look to picture for green and purple just different 5-8 CP
Soo have fun guys