The color was
recorded using CIE-L*a*b* uniform color space (CIE-Lab) where L*
indicates lightness, a* indicates hue on a green () to red (þ) axis,
and b* indicates hue on a blue () to yellow (þ) axis. Additionally,
the cylindrical coordinates: hue or hue angle (h) and Chroma (C*)
were defined by the following equations: