Thanks for the reply! Unfortunately, for the project I'm working on, each refsheet is a different size. So what I did was use the Color Swap with a saved preset (I love that this exists!!), opened each sheet, swapped the colors with a single click and saved. It was also helpful in another file where I needed to swap colors in multiple frames! Definitely a great tool, thanks again for creating it.
Is it possible to set the color swap to a keyboard shortcut? That would be insane, like Shift+1, Shift+2 depending on the preset.