1. DomName('WebGL2RenderingContext.clearColor')
  2. DocsEditable()
  3. Experimental()
void clearColor(num red, num green, num blue, num alpha)

Source 

@DomName('WebGL2RenderingContext.clearColor')
@DocsEditable()
@Experimental() // untriaged
void clearColor(num red, num green, num blue, num alpha) => _blink.BlinkWebGL2RenderingContext.instance.clearColor_Callback_4_(this, red, green, blue, alpha);