Santo Domingo de los Tsáchilas is a province in the Republic of Ecuador, created in October 2007 from territory previously in the province of Pichincha. The name of the province refers to a local ethnic group, the Tsáchila, also known as the Colorados on account of the custom of the Tsáchilas (specially men) dyeing their hair with paste made from achiote plants. The provincial capital is Santo Domingo. Its population is approximately 500,000 inhabitants in 2008, fluctuating as it is the third largest city with more population following Guayaquil and Quito. Full HD.