Plate2. Michael Rubenstein for the Wall Street Journal

(Garnet red is a prominent hue at the Darby, a high-end supper club on 14th Street between Seventh and Eighth avenues.
Ref.http://www.google.co.in/search?hl=en&biw=1354&bih=561&q=color+in+restaurant+design&bav=on.2,or.r_gc.r_pw.r_qf.,cf.osb&um=1&ie=UTF-8&tbm=isch&source=og&sa=N&tab=wi&ei=7YrRT6z4H8mUiAe2qY2UAw ; June 8, 2012)
The interior of the restaurant is flooded with the red color (Plate2) which the healthy environment for the appetite. According to a Wall Street Journal, New York “We're aware of some of the psychological features of red," said Kristina O'Neal, a principal at AvroKO, a design firm. "We have always heard that the most successful restaurants or the top-grossing restaurants feature red in the main dining room. We don't know what's urban myth or fact."
Psychological ‘Red’ is more popular inside the restaurant– and it’s found that the red color environment making people hungry. This hot color psychologically stimulates the appetite and its gracing restaurants all over town, the above picture of the restaurant certainly would make most people hungry.
The decor of an eating place is highly affected by the color inside. Unknowingly in our subconscious there are certain food colors that appeal to us and a few that don’t. They affect our appetite and our mood, and it all comes down to psychology and where the colors occur in nature. Here’s a breakdown of some of the most popular – and unpopular – colors when it comes to eating.
(http://online.wsj.com/article/SB10001424052748704415104576065993393296616.html ) March 27, 2012

The appetite and the healthy effect on humans are strongly depending on color and smell. Psychological and physiologically our digestive system start working the moment we see the food (color). The olfactory system entices further helps us to attract towards the food. The color of food is extremely important which communicates through our visionary.

Today all food color additives are carefully regulated by federal authorities to ensure that foods are safe to eat and accurately labelled. This brochure provides helpful background information about color additives, why they are used in foods, and regulations governing their safe use in the food supply.