They do like them now I think 👍
I've caught on yellow, white, brown, pale yellow, beige, pink, wo pink various flavours some boosted with amino baitsoak, if I want to match the hatch I will use a brown proper job BP+ it's a similar colour but unique flavour,
I agree with you on establishing a bait though, I find they can be caught easier with regular prebaiting, if you can get them to regularly visit they are catchable probably on any hookbait 😁👍