This program steps through red, green, and blue color components to create an assortment of colors. See the code for details.

This version of the program also allows you to create a 48 color palette.

Note that this program does not actually use color palettes in the display sense (as opposed to high color, true color, and so forth). It just displays a nice assortment of colors.

For more information on color programming, including some on using color palettes, see my book Visual Basic Graphics Programming.