It' surely can't be a co-incidence that the 3 liveries IAG have launched (Iberia, Level and now EI) are all an almost identical style. EI went to great lengths in their presentation to explain what the brand/livery should represent, yet as if by magic they ended up with a blue/green version of Iberia ..
As for the other IAG airlines, Vueling largely fit the theme already. Just BA left to get the "Eurowhite with coloured tail" treatment?