Fig. 2From: Standardizing HER2 immunohistochemistry assessment: calibration of color and intensity variation in whole slide imaging caused by staining and scanningColor Chart Slide. a Slide overview; b Reference colors calculated from spectral transmission data for each color on the slide, the CIE color-matching function, and spectral distribution of illuminant D65; c Whole slide image scanned at a resolution of 0.23 μm/pixelBack to article page