Custom annotation colours?

Hey there! I just started playing around with this app and overall it seems quite nice! I’m not sure if I missed something obvious, but are there any ways to set custom annotation colours (for both highlighting and pen strokes)? I’m not fond of the pale pen colours, and darker highlighter colours that are available by default (I just want a basic red/blue pen and a lighter yellow highlighter). It would be fantastic to be able to set custom RGB + opacity values and save them to the color palette for both the pen and highlighter, as well as reorder the default colours.

Thanks!

I guess a minor update on this: I see this feature in the beta web viewer, but in my original post I was referring to the iOS app.