A mix. Some cc's and some cp's. I hobby at theatre lighting and bring home the odd scrap of that stuff too. It works fine for me in many situations, even if not optically perfect.
The viewer of a print does not have to know what went into making the print.
Kind of like enjoying a piece pf pie and wondering if the eggs were chilled before being whipped. If the pie is good enough no one cares how it was made.
Theatre gel, as other posters note, is a deal. A designer swatch book from Rosco, and a life times worth of filters for most photographers for a whole $20.