This site talks all about the color yellow and pulls an interesting quote from Wassily Kandinsky. I've listed it below:
"A yellow circle will reveal a spreading movement outwards from the center which almost markedly approaches the spectator; a blue circle develops a concentric movement (like a snail hiding in its shell) and moves away from the spectator." --Wassily Kandinsky
It is fascinating to scroll through his paintings and see how they changed over the years. If you read his biography on this same site the changes in his paintings make sense.