I don't have any Citation books, it's been 30 years since I flew it, but I think it was AF presentations--red = slow, green = good. And I could be wrong there, too. It's been almost 30 Yeats since I bailed out, literally and figuratively, from the A-10, the last AF plane I flew having that display.
The AOA presentation is so small on the Global screens, you really have to look for it. I flew with an ex-French Navy pilot recently and we both missed it.
GF