1. @DomName('WebGL2RenderingContext.colorMask')
  2. @DocsEditable()
  3. @Experimental()
void colorMask(bool red, bool green, bool blue, bool alpha)

Source 

@DomName('WebGL2RenderingContext.colorMask')
@DocsEditable()
@Experimental() // untriaged
void colorMask(bool red, bool green, bool blue, bool alpha) =>
    _blink.BlinkWebGL2RenderingContext.instance
        .colorMask_Callback_4_(this, red, green, blue, alpha);