I was watching these fly over the house and it seemed to me that they were painted in a tan color. I got several looks at them, all from ground level and at an angle, but the F-16s flying at the same time all looked gray. Is it me, or is there a different paint scheme?

Actually aside from the Odd bluegrey leading edges she is painted like an F-15C in an air superiority scheme. I see alot of them when I goto my appointments at the vet hospital in Hampton,VA. We have the most here at Langley AFB with the 1st Fighter wing and VA ANG flying the F-22. I'd guess it's the metalic finish reflecting light in some way that is giving them the odd colour.

just to give you an accurate account on colors and maybe you will see something that helps you
https://aeroscale.kitmaker.net/forums/163470&page=1