I started colouring with Promarkers and loved them. I moved onto Copics about a year ago, but I still think Promarkers are great pens.
When I was learning to colour I remember finding it really frustrating that so many people coloured with Copics and gave their colour combinations but I couldn't work out the equivalent in Promarkers.
When I had quite a large collection of both I decided to try to match the colours as closely as I could.
To my surprise a lot of them were different - they varied in tone or hue between Copics and Promarkers too much so I couldn't get a close match. This may have been because of colours I was missing, or it may just be because they don't match.
These are the colours I found gave a satisfactory colour match. Hopefully they'll be enough to give you a starting point if you're trying to match colours with something you've seen.
Feel free to save these & share the link so people can download them themselves, but please don't pass them on as your own x