Ability to apply formatting by row/col index

I'd like to be able to use colorDF to display QAQC results in custom functions. Primarily I would like to be able to highlight specific cells in a dataframe (printed in the terminal) that have been identified through separate means. On the front end, this would act akin to df_search() but take a list or dataframe of row/col pairs instead. Would it be easy to provide this functionality?