What are the indicators used to detect bases?

One common indicator used to detect bases is with litmus paper. Red litmus paper changes its color to blue when it comes into contact with a base. Phenolphthalein is another indicator that turns fuschia color in the presence of a base. A third indicator is red cabbage juice. The color of the cabbage indicator changes to green or yellow in the presence of a base. It is important to note certain indicators are not specifically made to identify bases, but instead provide an approximate indication of the pH of a solution.