For my palette I use an old dish I found in my mother’s pantry. I don’t think she would mind. It is a roasting tray I think, it has a drain, if you like, around the inside edge. This is handy because the excess water goes in there, and sometimes I use it to create a wash. It is white, porceline probably. It comes up sparkling with a quick wash.
However I don’t often wash it, watercolours stay quite usable even if they dry. It’s due a wash about now though.
I use a limited range of colours, all Windsor and Newton. For red mostly alizarin crimson. For yellow I use raw sienna, lemon yellow and cad yellow, Green i mix usually, but I use hookers green too. For blue, I use the widest range. This is because I love to paint the sea. I have ultramarine, prussian blue, turquoise, phalo blue, cerulean blue and cobalt blue. I use burnt umber and sometimes paynes grey for darker tones.