Ash tones unfortunately get the reputation of being "boring" because people associate so much excitement with red tones and purple tones. However, ash tones are very flattering, especially on certain complexions.
Ash tones often have a blue or green base, but this doesn't mean that the hair looks blue or green. Instead, they simply negate any red tones or bronze tones in the hair. Ash tones can combine with golden tones to look quite pretty. Some people think this looks a little more like beige tones.
Blondes are almost always more flattering when they are neutral or have ash tones. This is because most people with the coloring that can pull off blonde either have neutral toned skin or cool toned skin. Ash tones, especially ash blondes, look fabulous on fair skinned people with cool undertones and light eyes, whether blue or gray.
Ash colors also tend to look more natural, since most people's natural hair colors are either neutral or have ash tones.