1. DomName('WebGLRenderingContext.blendColor')
  2. DocsEditable()
void blendColor(num red, num green, num blue, num alpha)

Source 

@DomName('WebGLRenderingContext.blendColor')
@DocsEditable()
void blendColor(num red, num green, num blue, num alpha) => _blink.BlinkWebGLRenderingContext.instance.blendColor_Callback_4_(this, red, green, blue, alpha);