I wasn't surprised that blue is associated with depth because, after all, the sky and ocean are blue. Well, sometimes the sky is blue, and in some places, the ocean is blue. But blue also symbolizes stability, and neither the sky nor the ocean can be counted on to be stable. Just think hurricane or tornado.
Ah! but also on the list is Heaven. Blue symbolizes Heaven. Now there I can see a clear relationship to depth AND stability.
Physically, blue has demonstrated a positive effect on the mind and body. Certain shades of blue causes human metabolism to slow and calms aggitated individuals.
When I think of the promise that God has given His children,--that we will go to Heaven, a place He has prepared for us--I breath in peace and exhale worries. All of our troubles here are fleeting in comparison to the wonders and glory of being in the presence of our Lord and Savour for eternity.
Next time I get aggitated as I sit in traffic, I'm going to turn my eyes to the blue of the sky and remember a permanent vacation spot called Heaven where I have not only a room reserved, but a whole house. Yes! I can see how that would lower my blood pressure as well as my metabolism.
A footnote to the info on the meaning of the color blue said not to use blue when cooking and serving food, because blue suppresses appetite. In the name of perpetual dieting, I think I'll go out and buy blue dishes, blue glasses, blue tablecloths, blue napkins, blue candles in blue candleholders, and a blue flower arrangement. Painting the table, chairs, and walls blue might help as well.