Sure...I'm not sure what the command line is for though, is that for RastaConverter command line? I use the GUI front, so I don't use commands.
Edit: Looks good on my setup! The colors all look good, bright red car. looks even better in real life than the screen shot here. The greens are more olive colored than in the emulator. There's a bit of red banding in the trees that doesn't show up on your screen shot. Of course I have been playing with my 1200XL's color pot recently and may not have reset it perfectly.
Ugh! Banding is always a concern but the red at the edge of the shadow of the Chevy is more of an issue. That's false color. I didn't see it in the emulator. Using the regular palettes.
Command was just the invocation of the emulator, Atari800, from which I get screens. Users need my palette to get the same saturated colors in my image (if not using real hardware).
Give my palette a try for Rastaconverter. My palette has lowered contrast. I find I always need at least " /contrast=15". If you use "/S=1" you will get usuable test renderings almost immediately (well, in a couple of minutes). If you get bright pink pixels where they don't belong then /dither_val is too strong. If you get charcoal gray pixels prominent in dithers (where gray doesn't belong) try combinations of lower gamma and higher contrast. This tip seems to work best with 'chess' and 'line' dithers. Less so with 'jarvis'. Not at all with 'knoll'