The hat probably has an open back (trucker style) which reduces the # of square inches of orange. I guess technically, since much of the rear of the cap would be perforated, it wouldn't be considered "solid". A fitted hat would be solid and might consist of off 144 inches of orange minus the bill.

A toboggan or beanie would be "solid " orange in 360 degrees and probably would be 144 inches.

I use a cheap $3 solid orange cap to move to and from my stands when weather permits. I use a cheap solid orange toboggan or beanie when it's cold.

I'm not on anyone's prostaff or making a fashion statement while hunting so, no need for logos. I do have hats similar to the op's for driving around, attending dinner parties and church because there aren't any regulations in those instances.