I'm not sure how others do color for color riso, but what I did was color Faster in CMYK as I normally would in Photoshop, then switched modes to multichannel giving me C, M, Y, and K channels instead of layers.
I deleted the Y and K channels and then tweaked the C and M to the colors I wanted.
Just added some originals and renewed a few things on Etsy: https://t.co/7f90mukpUf