Browsing random Amiga OCS pics I noticed that many of them have fudgy colours that do not fall into the 12 bit spectrum. The hex values really should be 00, 11, 22, and so on to ff. 00, 10, 20, to f0 is also acceptable, but too dark imo. This one here has colours all over the place, but they turn out ok if they are converted to stretched 12 bit.

I guess this is due to some older version of WinUAE being weird with colours when not having the right graphics driver selected?