my two cents: the A’s are much better than the B’s, for in the B’s the “arts” looks like an afterthought. and the “A” does not convey “a blue” the phrase is kinda broken. (looks like “A” grade).
A1 is more visually appealing than A2, because of the unlkely colour combination chosen. i took the liberty of foolin around with your concept.
when “blue moon” is of the same font size the “once in a blue moon” phrase seems connoted. try different font sizes. (i used a larger “arts” to emphasise your key concept (no?)
hope this doesn come too late