reuse palette in multiple projects

I would like to save a palette that has just a few standard styles/colors I like to use (sketch color, guide lines, etc).

Unfortunately, the palettes seem to be limited only to individual projects.

Is there a way of saving a custom palette and having it always be a menu option in the palette menu?

to do this, export the custom color palette created to a folder to hold the palette exported, and then you can import it from any project.
Do this, having selected the palette created in: colous palette, click on the upper right button, which opens a drop down menu, select: Palette / Export palette, the palette to export appears checked, browse the folder where you save your color palettes and click Export button. Import process is very similar, browse your exported palette and click Import button from any project. I hope you find it useful. Yoryo.