After color has been done if you are someone who wears their hair naturally curly, it's important to co-wash your hair. Shampoo strips vital oils out of your hair so co-washing is best if you wet your hair often. Conditioner does actually have cleansing agents in it so your hair will get a cleansing as well as retain the oils.
If you don't wear your hair curly then it's important to not use excessive amounts of heat and make sure your hair is hydrated and not dry. After leaving a professional after a color service, it's up to you (the client) to maintain healthy habits. If you aren't good at hair maintenance then you probably shouldn't have gotten color to began with. However if you did, make sure that you are wrapping your hair daily with a satin scarf or bonnet. If you are really lazy then make sure you at least have a satin pillowcase.
The main thing to remember when you have color is that you have to get it hydrated. The hair has been broken down/stripped so it needs to be built back up. That's why after any color service a neutralizer should be used to bring the ph back to normal. As well as a protein treatment, followed by a deep conditioning.
First look: Natural hair, Partial Highlight (toned), Base change, Pressed and Ceramic curled
Second Look: Natural hair (Virgin hair), Partial Highlight (toned)(slice technique), Pressed and Ceramic curled