Another picture came to me today.
This is the house of Sten Hermansson who had the swedish Mira-X agency in the 70:ies and 80:ies. This is his combined showroom and home. As you can see there are lots of Mira-X curtains arranged in colour order here. Also the wall-to-wall carpets are arranged in the same colours. I think this picture is from 1982.
Very cool!