I added a new palette-swap-shader project to the Demo projects archive that can be downloaded from the Pixelbox page.
This project demonstrate how to use a shader filter to achieve a palette swap effect.
Note that it needs version 2.1.1 of the Pixelbox library. While creating this demo, I noticed few improvements that where required in the ShaderFilter component. This changes will be included later, in the next release of Pixelbox. I the meantime, you need to update the library by yourself using npm install.
Please let me know if you’re not familiar with NPM or if you have trouble installing the 2.1.1 version.