The clothes were red, pink, blue, and so on.

Literal

Clothes [topic-は] red, pink, blue-color etc. were.

赤、ピンク、青色などであった — a descriptive list using など (et cetera). であった is the formal past copula. The mix of native Japanese (赤), loanword (ピンク), and Sino-Japanese (青色) color terms is typical.