Add 1 tsp. of liquid food coloring to 1 cup of water. Drizzle the colored water onto the soil surrounding the base of a plant. Wait 24 hours for the water to absorb. Apply another identical dose if the color change was not sufficient.
I do this ALOT with clients.. give them a total custom look by mixing fabrics! Sometimes, we come across a quite costly fabric with pattern, ill mix it with an inexpensive fabric that compliments their pallet, for that custom design!