then neither is there evidence that I do, or you do.

I have plenty of evidence of my own experiences. Were you restricting "evidence" to third-person, objective evidence?

I can't think of qualities that my subjective experience of "red" has that the atom "red" does not have in my program.

I can. I think that if I experienced nothing but an even expanse of red, that would be different from experiencing nothing but a salty taste, or nothing but middle C

Sure they do. Redness has this unique redness to it the same way "red" has this unique <object at 0x8cf643>ness.

Redness isn't expressible. "Object at 0x8cf643" is.

Your programme's qualia are subjective because can't examine their internal structure...but there ins't any.

Sure there is. Go look in the lua source code. there is the global string memo-table, GC metadata, string contents (array of bytes), type annotations, etc

If that's accessible to them, it's objective and expressible. If not, its just a nothing. Neither way do you have a "somethng" that is subjective.