In what phase does hair grow : the catagen, telogen or anagen???

there is no such thing as grey hair so when hair grows, either it is pigmented, or it is white. The greyish appearance of hair is only in fact a kind of optical illusion, produced by the mixture of coloured hair with white hair. I WOULD LIKE TO KNOW IN WHAT PHASE THIS OCCURS

In what phase does hair grow : the catagen, telogen or anagen???

Approximately 85% of all hairs are in the growing phase at any one time. The Anagen phase or growth phase can vary from two to six years. Hair grows approximately 10cm per year and any individual hair is unlikely to grow more than one meter long.