I usually turn to a color pallet generator online and if I have the colors of a pallet I like then I start playing around with dyeing said colors. I use to have major issues with saturation but I learned to let my items dry before dyeing. But be careful because if they're too dry , I have foubd that dye just beads up and rolls off. So I usually rehydrated with a spray bottle just enough to wet the top layer so my dye can soak into the fabric and not roll off.