I read the following poem in the July 2017 Voice of Faith newsletter. It is uncredited, so I don't know who wrote it. It seems designed to use colors to help kids remember some things about the gospel.
Blue is for the Son of God, who came from heaven above.
Brown is for the cross he bore, to show us his great love.
Red is for the blood he shed, to take away our sin.
White is for forgiveness, and the peace he gives within.
Green is for eternal life God gives to those who trust.
Gold is for our home above, where Jesus waits for us.