Painting circles

Use the available colors to paint all circles inside the triangle so that adjacent circles have different colors.
Click on the gray circles to change their colors.
Adapted from [url=https://portaldosaber.obmep.org.br/index.php/site/index?a=4]Quebra-cabeças de Matemática[/url] by [url=http://www.obmep.org.br/provas_static/pf2n3-2013.pdf]OBMEP[/url].
– Diego Lieban

Information: Painting circles