Have you ever thought of the reason behind the colors of food as they are presented in certain dishes? Let us take for discussion those of sushi in Vegas. You will see pinks and peaches as in shrimps and crab meat. There will always be yellows and browns as seen in thin wraps and sauces. And whether or not there are vegetables in the dish, greens will be present by way of leaves or paper and plastic art designs. The beiges and reds can be seen in most fried food items with their dips and sauces. And even if the color black is predominant in their serving platters and maki wraps, one cannot miss the fact that Japanese food always has clean cuts in their presentation. The food even seems to pose for you like print advertisement models. I think it has something to do with the culture from where these dishes come from; its compliance to being simple but not small and clean but very flavourful.