Instructions
  1. Please enter the number of columns and rows to generate the grid.
  2. Click on a color from the palette below, or click on the custom color box to pick out a color.
  3. When ready, place the color in the grid by clicking on the target area.
    (Tip: you can cover multiple cells by clicking and dragging over the desired area.)
  4. Press SHIFT and click to undo.
  5. Press ALT/OPTION to apply overlay blending of colors.

Custom color:

Current color: