This entire environment is inspired by the 1950s, specifically the archetypal housewives and advertising of that era. The colors are inspired by 1950s kitchens and detergent ads.
Fran the 50s housewife instructs patrons of the laundromat to remember to empty pockets of valuables before washing them. The posters above the washing machines display phrases from popular 50s detergent ads. One wall features a laundry symbol chart to help those who aren't familiar with what the symbols on their clothes' tags mean.