I need a script to change colors via swatches in multiple files at once

So I have files with fill colors, that I need to replace to different ones. I am using swatches for all colors, so it would be handy to use swatch names. Also it would be handy to have minimal interface, so I can enter values, as I'm working on multiple color swatches.

Example: swatch_name_blue replace with swatch_name_green across all open files.