Jewel Box is only one of the names of that pattern. Eleanor Burns' online video start out by showing a stack of quilts in this pattern made in a variety of fabrics. She calls them all Jewel Box. Some are quite pastel. I'm thinking of the one in the 30s fabrics.
Yours is lovely. Mine is coming along. It's my job for this week. Nothing is ever too pink. Keep it and make your son a new one.