As a continuation of the previous post here are some examples of how reference images color palettes get used in vibe transfer.
First example uses the vaporware tag along with the floral shoppe album cover to give a strengthened color palette.
Second example uses an actual color palette image as the reference image. In this case it was a "vintage" color palette (think 1960-1970 style) with no art modifying tags other than game cg.
Last example uses the darkest dungeon cover art as a color palette reference with no modifying tags other than game cg.