You could create a palette with the basic colors and add the colors you need or
use by using the color manager panel. Right click on the upper right corner of
the open color manager panel, click on add color swatch and then look at the
color palette panel for the newly added color swatch.
Right click on the upper right corner of the color palette panel (they looks
like 3 small lines). On the popup or dropdown menu, you'll see something that
says "Save palette". Click on that and give it a different name from the
default palette. Make sure you don't overwrite the default palette. Save it in
the same folder as the other default palettes. This makes it easier to load the
palette the next time you want to use it. When you are ready to use it, right
click on the upper right corner again and click on Load Palette, navigate to
the palette folder, click on the aforemetioned saved custom paletter and Voila!
you got your custom palette loaded and ready to use