What liquid changes color when electricity is applied?

The liquid that changes color when electricity is applied is often referred to as an electrolyte solution or a conductive liquid, and one specific example is a solution containing phenolphthalein, which can change color in response to changes in pH. However, for a more relevant answer regarding color change due to electricity, you can use a liquid crystal display (LCD) or electrochromic materials. Electrochromic materials can change color when an electric current is applied, making them popular for applications like smart windows or displays. In a scientific or experimental context, some conductive fluids or slime (that contains conductive particles) can also show color changes due to electric fields. If you are looking for a specific experiment, you could use a simple setup with a saltwater solution and electrodes, where the solution might show some changes in color or appearance depending on the voltage and the process occurring (like electrolysis). If you're interested in a more specific application or substance, please provide additional details!