What are my transplanted hairs turning white after hair transplant? (Photo)

hy. I am 26 years old male.i am in 14th day postop now. I went through FUT hair transplant and now when scabs are clear from recipient area I have noticed several white hairs. my head was shaved for transplant so these hairs could not be my existing hair. I have noticed these white hairs both in transplanted and donor area. I had not a single hair before . I have just used pyodine srub for 12 days for washing hair after transplant and oxoferin solution for better healing only at recipient area.