Sunshine, I expected. Joy, happiness, and energy are no-brainers. But did you know that yellow also is associated with intellect.
Yellow is known to warm a room. It stimulates cheerfulness and promotes muscle energy. But it also generates mental activity.
Too much yellow disturbs the psyche. Babies cry more when surrounded by brilliant yellows. Yellow against black causes babies to perk up and focus. That color combination is also used for warning signs.
It is amazing to me that God engineered light to give us colors. A rainbow stirs my soul and puts me in awe of the great Creator.
As is true of so many things, what we observe is only the surface. God is intricate, and His creation reflects that. Yet He made our salvation simple. Just believe in the Lord Jesus Christ and accept His work on the cross to cover our sins. This simple truth opens the door to so many not so obvious things like joy, Heaven, comfort, eternal life, and . . . well, you get the idea.