An article on Manx Radio's website presumably from a FlyBe/Stobart Air press release says the 2 72 seat ATRs will be "FlyBe branded". That suggests FlyBe livery as apart from crew uniform, magazine and menu cards there's not much else "branded" on a FlyBe aircraft. See here:
Flybe signs 'wetlease' deal with Stobart Air | Isle of Man Business | News | Manx Radio