Ultramarine violet pigment is a version of ultramarine blue with a purple hue. While it is similar in colour to dioxazine violet, it has a far weaker tinting strength and is considerably less expensive. Because of its extremely high tinting strength, dioxazine violet can be difficult to work with, as it can overwhelm the other colours in a mix. Ultramarine violet is useful for subtle effects in glazing or watercolour type techniques, for example, painting shadows. It has excellent lightfastness.