That is enlightening. The clipboard does have at least two versions, HTML and plain text. I note that the html styling is different to what is shown in the bbedit window, following some html formatting rules.
you can see that with the first selector, ":root" is black text in the bbedit window on the left (css is the active language selector), but the clipboard html defines color: #850052 (a purple).
That explains what I'm seeing.
Maybe one of the Barebones people can elaborate on what is used when building the clipboard?
Rob