It is a color image. Resolution is something other than 640x480. Not sure which resolution however.
No documentation and I have tried all NuBus slots in both of my Macs with the same results.
The chips that I think are the RAM look like they would be impossible to replace, at least by me. They don't appear to be thru-hole setups. Please refer to pictures:

My PRAM batteries are good. I have loaded the Radius software but it appears that the card is configured through the Monitors control panel. Even taking this into consideration I am reluctant to view this as a configuration problem due to the images I am seeing on the display directly at startup, see below. (The images are from 2 separate start-ups.)


