^ characters in some windows

[nmokkenstorm]

Hey, first of all thanks for the work in this theme, I really enjoy working with it so far.

I initially ran into some issues with weird control characters appearing in statuslines, but was able to get those out of the way using the recommended

let &t_8f = "\<Esc>[38;2;%lu;%lu;%lum"
let &t_8b = "\<Esc>[48;2;%lu;%lu;%lum"

However, I still run into an issue with the ctrlp plugin. The issue doesn't show up with my usual colorschemes, which makes me believe it's an issue with purpura.

I'd love to help out with fixing this, but I don't really know anything about creating themes.