I am a writer and I would like some help with a fictional drink, because I don’t drink and know almost nothing about alcohol

I am writing my third novel and one of my characters is fond of a mixed drink called “Purple Pistola.” I have googled and it does not seem to exist, if I’m wrong, please tell me. The only thing I have written is that it is a mixed drink, is served in a whiskey glass, is quite a strong drink, and is a vibrant purple color.

If I have to simply be vague I will, but I’d like some advice on what it might be so I can be clearer in my writing.