What is the best permanent hair coloring product?

I need the best product out there that colors gray and resists fading. I have used light ash brown in several brands but even that seems to fade into a reddish color after a few weeks. Please share the cost if you know it. Thanks!What is the best permanent hair coloring product?
I have had great success with Garnier 100% line. It covers all my grey well and fades less than any other colour product. You're going to have some fading in between going under the bottle-that's just a fact of life, so use a gentle shampoo and shampoo less often, but condition like crazy. I haven't tried any of the colour boosting/enhancing products, so I can't say but they may be worth a shot to give the colour a boost between colouring.What is the best permanent hair coloring product?
I think Feria by L'Oreal is one of the best. It's expensive over $10.00 per box but it definitely covers gray. I also use L'Oreal highlights kit ($19.99)to give multi dimensional highlights.I place the highlights near the gray hair to help blend them in when they start growing out.
L'Oreal products are good.They are about $10.00
I like Clairol Nice N Easy. I've used it forever. My mom uses it too and she never shows grey and it doesnt seem to fade as quick as the others out there. Good luck. You'll find one you like.
Read some useful hair colouring tips on this site to help you