To be honest I haven't read some of the comments.
White before they changed to the White branding and (silver) offered tractors and combines in sumac red (Cockshutt), Meadow green (Oliver) or power yellow (MM). Often the same exact machine but may have had different model numbers.
I often wondered why when ordering parts you never knew what color they would come in.
Personally I was not a fan of the old pararie gold MM's, I always thought the power yellow looked better.
As a yougster I was raised and used those green and yellow tractors, once I started work I was working on MM's and MF's with a few Nuffield's (orange) and "other" brands mixed in.
Today I have the red and flint metallic gray tractors (MF) in my shed. Would love to have a power yellow (MM) but can't afford the current prices for them