Not sure if it would interest me too much as I my eyes are drawn to the big red letters rather than a red bg (same goes for the green letters vs green background)
Before reading the thread, I looked at the pictures and compared the 2 and I thought you were changing the look of the 'current month'.
I found it easier to see the current month as a green bg, not the little red corner (I never seem to notice that unless I'm looking for it).
tl;dr
Having a coloured bg for budget state doesn't interest me as I focus on the coloured numbers... but
If you had all the months as grey and the current month as green bg, it would probably be visually pleasing