What is universal indicator? Md. Saifur Rahman Universal indicator is the mixture of various acid and base indicators. Universal indicator turns to different colours for different values of pH.You may likeDo I need car insurance?What is car insurance?How could I get cheaper car insurance?What is auto insurance?Why Adulterant food is the barrier to sound health?What are the producers?What are food preservatives?What is food chain?What is tertiary consumer?