When the lightness values were plotted against chroma values (Fig. 2 A) and the hue angle values were
plotted against chroma values (Fig. 2 B). It was clearly observed that the lightness and chroma were not
significantly changed with the increasing of the storage times. This might be due to the anthocyanins are
stable in low pH and low temperature. Moreover, the shelf life of yogurt is short; this makes CBRB suitable
for applying to flavored yogurt. The figures also show that the yogurt with different colorant concentrations
had different shades of purplish pink color, which the yogurt added with 0.6% CBRB indicated the strongest
color.