Style Lora trained to attempt to create beautiful images with a stricking contrast between the greyscale image and the colors accents. I reccomend using: (grsclclrs:1.5), ((monochrome, color accents)) in your prompt, without the added weight it has a hard time affecting the result properly, you can also add "greyscale" if the original colors of the character show up too much. You can also add "DESIRED COLOR_theme" to select a color that you want, otherwise it will usualy default to the main color of the character if it is an existing one.

lower weight = less collers, more weight = more colors, adjust weight to your liking