gold and blue, due to the price of the paint components, were hallmark of an expensive art painting through the history until very recently. Thus using those colors allows to exploit that association and puts your movie at perceived level of the old masterpieces.
That also correlates nicely with the fact that cheap or produced in other countries inferior color film (like in the USSR for example) didn't have good blue, was reddish-greenish instead, and thus this gold/blue of today also suggests associations with better quality.
Maybe somewhat ironically, this assumed association with quality without an associated real correlation with quality leads to crap trying to pass itself off as amazing stuff by using such techniques. This then leads to an association with crap rather than the quality they intended....
I wouldn't have thought that the demographic that enjoys Transformers would have much overlap with the demographic that's aware of more than one or two paintings of the old masters.
That also correlates nicely with the fact that cheap or produced in other countries inferior color film (like in the USSR for example) didn't have good blue, was reddish-greenish instead, and thus this gold/blue of today also suggests associations with better quality.