Masson's Trichrome is a three-color staining protocol used in histology. The stains used in this protocol are typically Biebrich scarlet-acid fuchsin, phosphomolybdic-phosphotungstic acid, and aniline blue or light green SF yellowish.

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Please note that the exact colors can vary depending on the specific protocol used and the duration of staining. Always follow the manufacturer's instructions for the best results.

The cytoplasm of cells, muscle fibers, and red blood cells are stained red or pink by the Biebrich scarlet-acid fuchsin solution.