You may also want to consider making "sets" of teal and brown like I'm doing, Michelle.
A "set" includes what was sold in each era:
1. Standard Model vacuum cleaner & matching attachments (e. g. 1205, 1401-B/Olympia One)
2. Budget Model vacuum cleaner & matching attachments (e. g. teal L, brown 1453)
3. Turbo Rug Washer/Floor Polisher: (e. g. teal w/ivory; brown w/ivory)
4. Model B-8 Carpet Beautifier/Floor Polisher (e. g. teal, brown)
5. Model CB Tank Cleaner (commercial): (e. g. teal top, brown top) I'm actually not going after these
To my knowledge Aerus has always done matching color sets for each era of cleaners with at least one exceptions (e. g. the ivory Model L and aqua Model G). Even the Model GHs (Model G for hospitals with extra features such as an after filter) had trim that matched the teal and tan trim of the domestic vacuum cleaners' trim which is nice for collecting or dating machines.
Pictured is the Turbo Rug Washer for that was sold during the Model 1205 era. The colors are the same but reversed from the earlier version of the aqua Model G era:
