I've seen this type of question asked before, but I've not seen a satisfactory answer:
I have a specific colour palette, and I can not stray from it at all; I have a specific green (32,144,24) on 93 layers, and I want to change it to a specific blue (24,32,144) on every layer. I have 3 different colours on each layer, and multiple palettes to go through and export (93 layers * 3 colour replacements * X number of palettes = no way I'm doing it manually.)
Because of that, I decided to look for a script to do it for me. I found two such scripts, but they both return errors when running, and do absolutely nothing.
Met with no luck on my own, I decided to ask the internet for help.
Thanks in advance for actually reading the OP and offering any relevant advice.
Two such topics I've viewed that yielded no results:
Replace individual colors in multiple layers
Change the color of multiple layers at once in CS4