Re: after color bad effects on hair
I would advise you don't use ANYTHING with chemicals in.
The best thing to repair and maintain hair to be thick, dark and lush ( I mean like pocahontas ) is lavender oil or jasmine oil. Mix equal parts with dabur amla / any oil suitable for hair.
Apply a small amount to the hair (not roots) after washing when it's still wet. As it dries, it will absorb the oil and shouldn't leave it greasy. Do it every time you wash your hair.
Try not to expose your hair to styling / strong weather conditions for a while to avoid further damage.
InshaAllah your hair will be lovely again X :)