Scraps from the Past - 1960s Girl's Formal Dress

Looking at this pattern, would you have picked orange polyester knit?

 Imagine my surprise to find a collar piece, with pattern piece still pinned to it, in the envelope!

In a way it is not surprising, as orange was a very popular color in 1969 (along with pink, yellow, and green).  And polyester knit fabric was also becoming common. I can only wonder - was the collar a contrast fabric or was the entire dress made from orange polyester knit? It would be fun to imagine this charming dress pattern in different fabrics. What would be your favorite?