I want to give a red and blonde look to my hair. I have bought an LâOreal professionals hair color for this. Actually I want to know that if I have to color only a part of my hair then how much color I need to take. Itâs not the ¾ as I think it will be more for my hair as my hair are not too long and thick. So what do you think should be the capacity of color to do red and blonde hair?