For starters, I recommend looking at the answers to this question, which colors make you hungry as that can give you some inputs about what colors to for your site assuming you already dont have a defined branding guideline in place.

With regards to whether you should use color or pictures, that would eventually depend on the the design of the site but since the objective of your site is to allow users to order from online restaurants,your objective is to get them excited and hungry. Research has shown that pictures of food do make people hungry as quoted in this study


  Max Planck researchers have proven something scientifically for the
  first time that laypeople have always known: the mere sight of
  delicious food stimulates the appetite. A study on healthy young men
  has documented that the amount of the neurosecretory protein hormone
  ghrelin in the blood increases as a result of visual stimulation
  through images of food.


The combination of pictures and colors can help you come up with a design which should be focussed on informing users about the choices available and the primary call to action. Here are some good examples of sites who do it well by both using colors and pictures well.

Seattle - Eat 24 hours



Food panda



Quick Burp



Which color to choose for food?
I do not seem to be able to see where in the RT core rulebook you can work out how many wounds a character starts with. During character creation there are modifiers to it, mostly through career path, but what exactly should the base figure be?

Based on the NPCs provided in the introductory campaign I would assume this figure would be around 20 to 25.

I would appreciate knowing what page actually states this.
