I rotate through shampoos and conditioners, because I swear after using them for any length of time they seem to stop working effectively. Then I discovered Pureology's line of haircare products. First of all they're all formulated to be extra gentle to colored hair, in fact they have what they call an anti-fade complex that promises to "help colour-treated hair retain its fresh-from-the-salon vibrancy with every use." And if that wasn't enough for you, they are 100% vegan and contain absolutely no sulfates. I've been using this line for almost a year now and my friends will attest to the fact that my hair looks best after a shampoo and condition using Pureology products.
Because my hair is baby fine, I use the Pure Volume (extra volume for fine hair) shampoo on my roots and the Hydrate Light (extra conditioning for light, fine hair) conditioner on the ends. Tip: most people don't need to lather up their whole heads with shampoo, apply a dime-sized amount to just the roots and lather and rinse. As the shampoo rinses out it will clean the ends perfectly. Conditioner is the opposite, especially for those of us with thinner hair, apply it only to the ends and let it sit for a couple minutes before rinsing.
You can buy Pureology at hair salons across the United States, check out pureology.com for locations.