I apologize for not getting back to you sooner, but its been an incredibly busy summer. So many posts I’d like to write, but no time to do it.

I first came across the information on the physical reasons that warms advance and cools recede in Kathryn Donovan’s book, Understanding Your Color on page 14.. I’d give you a link, but I’m not entirely sure where or if you can still pick up a copy these days.

However, she quotes Faber Birren and references his book Color Psychology and Color Therapy (The Citadel Press, Secaucus, NJ, 1950) on page 243. I hope this information helps out your discussion.