What did he say?

Turner's been talking a lot more lately, but sometimes we can't understand what he says.

One of the words he's been saying a lot lately is "jambo." He says it a lot and sometimes while walking around playing his banjo (which he calls "jo"), he sings it. Mom knew he was trying to say something, we just couldn't figure it out.

Today, Mom solved the mystery! She was walking downstairs with Turner, talking about colors each of our family members was wearing. After Mom said the color, Turner would repeat it. Hazel had on a mismatched assortment of colors and Mom said to Turner that Hazel was wearing a rainbow. Then Turner said, "Jambo!"