Place sugar in a jar that has a lid. Add a few drops of food coloring into the jar, close the lid, and shake vigorously. Adjust the color by adding more or less of the coloring or sugar.
To achieve the pink color above I used a little over 1/4 cup of sugar and 3 drops of red food dye. The color came out exactly as I expected, and has got me so excited to rim more drink glasses, and decorate cakes!