Is that a Construct logo? Anyway.... needs more NES, GameBoy, SNES and Genesis palettes. Maybe a way to preview them before they're loaded? The palette load should probably go into the default palette directory. Its tough to find after loading an image and then having to find the palette directory from there. Perhaps an eye dropper for the color picker?
Viewing post in New PixaTool from scratch. Feedback needed. comments
Yes the tool is made with construct.
NES and Gameboy palettes are added by default in the palette tab on palette slider name, btw you can always load external palettes until 192 colors in .pal format.
What i do is just add the images i gonna work in some pixa folder. Will try to see how to improve that.