These compounds did not undergo total destruction during
snack processing, and this could have affected the resulting colour.
All of the snacks that were obtained using coloured flour had lower
lightness (L⁄ in the range 64.23–66.90) than control samples. The
addition of flour from red-fleshed Herbie 26 potatoes resulted in
a pink colour (Hue = 29.55) that was attractive to the consumer.
The saturation of the colour (Chroma) of snacks supplemented
with flour from the red-fleshed potato variety was more distinct
(C = 15.55) than the colour of snacks produced with the flour fromthe purple-fleshed potatoes (C coordinate values between 4.34 and
4.90). Snacks made using a traditional recipe, without the addition
of coloured flour, had a more intense crème-yellow colour
(C = 20.01, Hue = 83.17). All of the snacks that were supplemented
with the flour from potatoes with purple flesh (independent of the
potato variety) were a grey colour with a light blue shad