The problem with bright colours is that they will show every grimy mark.
My own uniform is a dark blue polo shirt, baseball cap, sweatshirt and a waterproof fleece, all logo'd up.
Trousers through the winter are a dark grey combat style.
I've 3 polo shirts, 3 sweatshirts, 1 cap and 1 waterproof, all embroidered, total cost around the £80 mark, not expensive at all.
Ian