Change a note color

Please help me isolate one single note and change it's color to another color other than black. I do not want "colornote" but I only want to mark an isolated note for my own purposes. I did it before but I cannot remember how I did it and cannot duplicate it. I can change the staff color. Earlier, there was a color template when I highlighted a single note, but now I cannot find it. Your help in this matter would be greatly appreciated.
Minnette