It looks like the underside is actually tan but stained red by spores. What a pretty color. I have no idea btw.

Copying my comment on your other post, wanted to share here as well:

I ran through the field key in Bessettes' & Roody's Boletes of Eastern North America.

I think one possibility is: Caloboletus firmus.

The stalk is pretty beat up, but it seems like it might be a net stalk, so I went with Key B-3:

Net Stalks: with pores some shade of orange, tan, buff, red, maroon, brown to dark brown, or nearly black, p. 34

Then I chose:

1b. Pores not radially arranged and some shade of orange, red, maroon, or brown to nearly black → 2

2b. Pores red to orange → 5

5a. Cap whitish to grayish, grayish brown, or grayish olive; pores pinkish to red or red orange, sometimes yellowish at the margin when young, staining blue when bruised → Caloboletus firmus (p. 189)

So does this fall under tasty, poisonous, or warps the fabric of reality?