PINK LAKE FOREST 1 Pink Lake gets its pink colour, depending on weather conditions. The colour of Pink Lake is attributed to high concentrations of salt tolerant algae, Dunalella Sailina. This was first definitely established in 1980 after almost 200 years of conjecture. This lake has always fascinate me It is based in Western Australia Esperance. The blue represent the ocean and pink honors the lake in its glorious form.