You never heard of the “Blue Dog” Democrats?
https://en.m.wikipedia.org/wiki/Blue_Dog_Coalition
Yes. But it’s a ridiculous term to be sure. For starters, there are no “Conservatives” left in federal office as Democrats (the most “Conservative” member would be a left-wing RINO). This group was also founded in 1995, before the Orwellian newspeak color switcheroo in 2000, which also compounds confusion for those unaware (since “Blue” is recast as leftist, that makes it sound like these are the left of the left).
In Canada, the far-left in the Conservative Party are called “Red Tories.” I have no problem labeling “Red RINOs” for the similarly far-left or “Blue Democrats” if there were any actual Conservatives, but as long as said parties are more left as opposed to right, calling them by opposite colors remains offensive, especially when one (Reds) is explicitly associated with leftist totalitarianism and terror, whereas that is the polar opposite of what the GOP is supposed to stand for.