Tried seven or eight times, the highest I managed to get was 34 (averaging at about 30). I found that closing your eyes just before you proceeded to the next set of colors seemed to help a bit. Although, nothing could save me from the pure evil that was mid-range green and pink.
I got a 39 first try, 43 second time EDIT: Decided to have another go after i got out of an exam, got a 44 as shown in the attached file
29 without franctic clicking. Had to try a couple times before I got lucky and got not too many incredibly difficult ones.