Fashion has been showcasing bold, disconnected colors. Now, the freedom of color is expanding into hair!
You will need color bowls with multiple wells to hold the different colors that you want to add. Hair must be pre-lightened or bleached prior to trying to achieve any accent haircolor.
Semi-permanent colors do not have to be mixed with an activator. Using the law of color, you can achieve secondary colors such as greens and violets or just buy them pre-mixed if you can find them.
As far as maintenance, color treated shampoos and conditioners should be used to slow down fading. Also, the "touch-up on the roots" may be a little hard to maintain consistency if you want to continue to keep the look for an extended period of time.