Colorimetry for the stain technologist. III. The specification of color difference

Area of Science:

• Histopathology
• Color Science
• Biomedical Imaging

Background:

• Accurate color measurement is crucial in histology for diagnosis.
• Existing color difference formulas may have limitations when applied to complex biological samples.

Purpose of the Study:

• To calculate and compare color differences in various stained histological specimens.
• To evaluate the performance of four different color difference formulas (FMC 2, U*V*W*, L*u*v*, and L*a*b*) in this context.

Main Methods:

• Color differences were calculated for stained histological objects, including hematological substrates, cervical epithelium, and bone marrow cells.
• Four color difference formulas were applied: FMC 2, CIE U*V*W*, CIE L*u*v*, and CIE L*a*b*.
• Comparisons were made across different staining protocols (azure B-eosin Y, methylene blue-eosin Y, Papanicolaou) and cell maturation stages.

Main Results:

• Color differences were successfully calculated for diverse histological samples.
• Variations in color differences were observed based on staining methods and tissue types.
• The study identified and discussed limitations of the applied color difference formulas for histological applications.

Conclusions:

• The study demonstrates the application of color difference calculations in histology.
• Results indicate that current color difference formulas may require refinement for optimal use with stained biological tissues.
• Further research is needed to develop more robust color difference metrics for histopathology.