How to overwrite iris color pallates from theme to plugin

I am working n plugin for iris color pick and in plugin I want to make my own color pallets and overwritten on iris color picker that use in theme.

I create 6 fields in plugin where user can put their color hex codes and when user save them, then they overwritten automatically on pallets on theme.

So I create a custom iris color picker for testing in theme. And I enter some color pallets hard codded and then I install my plugin and save color codes that should be overwritten on theme color pallets. But I have no idea how to do this. I search a lot but nothing get.

So lease guide me for this.

via Chebli Mohamed