what is the chemical composation chemical formula of red and blue litmus solution? What is yhe difference in there composation?

Chemical composition of litmus is C₉H₁₀O₅N and C₁₃H₂₂O₆. Blue and red litmus is due to the presence of acid or base, this is not the color of the dye. The dye is a natural dye and is obtained from algae and lichens.