Shouldn't buy a car without at least air con nowadays especially if you ever want to sell it. Air con nowadays is inexpensive to run, no less reliable than any other part of the car and useful in winter as well as summer as it stops fogging and that general damp feeling.
Personally, I think climate is worth every penny but I've had it on other cars so know what I'd be missing, set the temperature, press auto and never touch it again against continued juggling of the controls and lurching from too hot to too cold, slight exaggeration but you get the idea.
Re the colours, that blue is one of those love it or hate it metallics that looks like it's faded in the wash, all down to what you like. If your local dealer hasn't got one they should at least have the painted panels so you can get the idea.