BW level 42 with the knight and still yellow perks.

Huh?

Have you considered…buying the perks? They turn a lovely shade of green if you do that.

I meant on the BW, but yes you can actually buy perks from the Shrine of Secrets.

Though, I’d recommend getting characters up to prestige 3 if you want their perks maxed out on all characters. Saves a lot of the grind in the long run.

That’s not what you wrote, though.

I’m still not sure what the actual issue is.

Are perks not showing up in your bloodwebs? Or are only yellow ones appearing? ‘Cause the title implied the latter.

If no perks are appearing at all, then I have to ask if you haven’t gotten all available perks already. If that’s not the case, you got yourself a bug.

Have to say, that was not clear from your previous explanations.

That just seems like poor luck, though. Again, to reduce the pool of perks that can appear in your webs, I’d recommend P3’ing other killers. That way you won’t need to slog through all their perks to get what you actually want. Or at least, not as much.

Also, every character starts out with their own teachables at tier 1 (yellow), so they wouldn’t appear as yellow in their webs anyway.

I bought Mikaela for her healing boon and if I recall correctly I didn't get to max the perk until prestige 2 around level 30 something. The game just sometimes goes like "screw this player in particular" and all you can do is scream in silence.