There's this very interesting article about the "The Iconic Colours of the 1950s" I read some days ago. It says here:
"Although Turquoise and Mint Green seem more iconic of the times, Baby Blue did make a splash in iconic colours of the 1950s in a big way."
Baby Blue & Cream
It was very popular in spring and summer. And it still is in fashion nowadays. Another colour of the 1950s palette is Cream. Together they are perfect for this two-piece.