To dye your carpets this is what you need.. A pump spray and liquid dye... Like for clothes.. You spray it on your carpets. Caution. You will need the either re-paint trim or tape off trim when dying carpets. Also until dye completely sets in; your socks can become stained. ;)
My carpets are so gross with 3 kids carpet cleaner - Awesome! Should've done before/after pics, but I had 3 almost black stains on my off-white carpet and they came up beautifully! Had to do it twice, but they had been there a LONG time and were really ground in. 2cups hydrogen peroxide and 1/4 cup baking soda. Put in a spray bottle squirt- scrub- vacuum!