Hoover Portable Colors
The oldest I've ever seen was dull green, and had a step-on switch in the same place as the newer toggle switch. Hose, cord and attachments were white. Later models were all typical shades of Hoover taupe, but the top covers came in yellow, orange, and lighter taupe, all with taupe hose, cord and attachments. The last model to be produced was a pretty blue, with white cord and hose and attachments. The lighter taupe cover model had large (~4 inch diameter) wheels on the sides, not the two small back wheels. This made the machine easier to pull, but the back end tended to bottom out. Cord winders were common, but some came without.
It's a fun machine!
Bobby in Boston