The earth used to construct a rammed earth wall may be naturally beautiful. Each soil is unique in its texture and color. The earth mix can also have natural iron oxides added to achieve a broad range of colors. These oxides allow for a great deal of variation in colors with the same soil mix. The range of colors achieved can be bold or subtle. The colors are integral within the wall and will not chip, peel, or fail over time. They are completely non-toxic.