Hello Laureli. I'm alittle late with a response to your color question but I would still like to add my 2 cents.
First, I believe your son is probably a starborne. You may want to read the book STARBORNE by Solara.
Second, convert the letters of the color to numbers and determine the numeric frequency of the color. Does it match a challenge number in his chart. For example blue, reduces to the number 13/4 a karmic number for transitions and moving on. It is also about trust and faith.
Third, convert the letters of the foods to numbers and determine their numeric frequency. Are there matches between these numbers and his challenge numbers?
If you need additional assistance, contact me through my web site www.awakener.com
In love and light
Michael