Making images with my ASI 294 MC PRO color camera thru EKOS/Kstars i get black and white images when i view the images hru Deepskystacker or a fitsviewer like AvisFV.
It beats me.
Have you clicked the options to debayer,3d cube etc AND unchecked the limited resources node box'x in FIS option ? The 3D Cube converts RGGB 3 channels els it does only 1 channel (B&W). I am no Astrophotographer expert but that worked for me