Question

What is the original color of phenolphthalein?

Answer 1

Chemical color is a physical feature that results from the excitation of electrons caused by the chemical's energy absorption. The complementary color resulting from the elimination of the absorbed wavelengths is what is seen by the eye, not the color absorbed. Atomic spectroscopy was the first to notice this spectral view.

Complete answer:
Phenolphthalein - It's a chemical substance called phenolphthalein. In acid–base titrations, phenolphthalein is frequently used as an indicator. It turns colorless in acidic solutions and pink in basic solutions for this application. It's a phthalein dye, which means it's a type of dye.
Phenolphthalein is water-insoluble and is normally dissolved in alcohols before being used in investigations. It's a weak acid with a tendency to lose hydrogen ions in solution. Colorless is the nonionized phenolphthalein molecule, orange is the protonated phenolphthalein ion, and fuchsia is the deprotonated phenolphthalein ion. As H+ ions are removed from a solution containing phenolphthalein and a base is added, the equilibrium between the nonionized and deprotonated states moves in favor of the deprotonated state.
So, we conclude that the color of phenolphthalein is colorless.

Note:
A dye is a colored material that forms a chemical bond with the substrate it is applied on. Dyes differ from pigments in that they do not bond chemically to the substrate they color. The dye is usually applied in an aqueous solution, and a mordant may be required to improve the dye's fastness on the fiber.