Good hair dye that lasts 2 weeks?

I want to dye my hair, I have tried to dye my hair a couple times unnatural colors, but they came out in like 2 washes when they said it would last 2 weeks.... so is their any tips that would help it last longer... should I use a dye that says it last longer... idk what to do, I am planning on dying it a dirty blonde color, and its around taht shade right now, but I want it just a tad differnt

plz help

Thanx

Good hair dye that lasts 2 weeks?

I would try not washing the hair, but instead rinsing it. Dont shampoo unless you really need to becauses the shampoo helps the dye come out.

Good hair dye that lasts 2 weeks?

ooooooo hair dye =)

Good hair dye that lasts 2 weeks?

Just buy permanant hair dye. They sell it at Walmart or Target.