https://guidebookgallery.org/screenshots/amigaos10
It seems they had at least 64 colors to choose from and they went with... Orange and white on blue? They also decided icons should be able to be arbitrary sizes for some reason, a feature I haven't seen in other GUIs.
Here's workbench 2.0, which is better but still pretty unappealing.
https://theamigamuseum.com/amiga-kickstart-workbench-os/work...
Scrolling through I thought "wait, that one doesn't look too bad" and then realized I was looking at a screenshot from Windows.
(The icons weren't just arbitrary sized, they could have different pictures for the selected and unselected state. You see this with the open vs. closed drawer icons (drawers are like "folders" in other OS's) but many app icons also used this effect.)
Or at least that was how tasteless teenage me saw it.
PowerPoint was original a Mac app that was acquired by MS.
Word was available on the Mac in 1985.
What you are probably thinking about is the deal that Jobs brokered when he came back for MS to continue supporting the Mac