5 Ways To Color Sand
You can use this method to tint sand at the beach and make brightly colored sandcastles with it. Consider dampening the sand with water. This will make it easier to mix the food coloring into it. You can also use liquid watercolor, but you may need to add more than just a few drops. Liquid watercolor comes in small bottles and is already diluted with water. [3] X Research source Do not use liquid watercolor if you are doing this at the beach....