State the colour of sand on Santorini beaches?

The sand on Santorini beaches varies in colour, ranging from black, red, and white. The black sand beaches, such as Kamari and Perissa, are the result of volcanic activity and are formed from black volcanic pebbles and sand. The red sand beaches, such as Kokkini Ammos, have a reddish hue due to the presence of red volcanic minerals in the sand. The white sand beaches, such as Vlychada and Koloumpos, are composed of light-coloured volcanic sand and pebbles