What patters/colours are /fa/ for a suit? Getting one tailored this month, picking material tomorrow.

I'm a caucasian male in his early twenties, blue eyes and messy brown hair. Fairly tall and slim. Already have a black one and a dark gray lightly chalked one.
I'm thinking lightly chalked dark blue for my next one. Thoughts? What color shirt to wear with it?

Pic unrelated. It's not the '20s anymore.