ok, now i get that you want to paint the entire booster in the same color,
firstly i thought u only wanted to paint the booster "pockets" in blue ala TV super max VF-1J
as for the latest mix you have, i still dont think it would go well with the blue valk...
perhaps a dark grey would be better
still, if you could show us a pic with a booster on one of the blue wings we can make a better judgement
as in the end, we want them both (wing/valk and booster) to look good together