This is a little tool written in BASIC to display the VERA palette and let you edit the colours. A palette file can be saved or loaded. A palette file is simply all 256 colours saved out of memory. The interface was drawn using PetDraw16. The program and files are on a SD card image. Simply attach and load pal-edit then run.
Code available from https://github.com/JustinBaldock/X16-SpriteEdit