Palette issue - LOST custom colors

I apologize in advance for asking such a rudimentary question, but...

I have 3 custom colors (my CutContour color and 2 annotation colors I use) which used to "stay put" when opening and closing Corel, but I have inadvertently closed the palette upon which they appeared. Now, when I open Corel, I have to go to an older file to "eyedrop pick" them onto my palette to use them.  When I close Corel and re-open it later - they're gone again.  Lil' help please...?