Need help interpreting this GM information kit

[kipps]

This shows the interior colors that are recommended for each exterior color combo. The document does specify that the customer can special order any available interior color.

The chart shows hashed boxes and 'x' boxes on the chart. Which one denotes recommended? I had assumed the 'x' boxes are the recommended category, but I have a very plain-jane zy1 copper canyon truck with a burgundy interior(which I figured was very common), but I don't see an 'x' to go with that combo.

Does anyone else have stock paint/interior setups, and can compare theirs to one of these charts? Link here -- https://www.gm.com/heritage/archive/...formation-kits