4.5. Colour
Differences in the colour of the specimens were compared using
the CIElab colour method, which evaluates the dimension of lightness
(L⁄) and dimension of colours (a⁄) and (b⁄). Values of L⁄ range
from black (0) to white (100). Values of a⁄ range from red (+50) to
green (50). Values of b⁄ range from yellow (+50) to blue (50).
Specimens were scanned using an Epson Expression 10000 Scanner
and evaluated in Adobe Photoshop in the L ⁄ a ⁄ b⁄ colour spectrum