Text in default text widget is always white not black.

Hi Matthew

This sounds like a similar issue to using Page Builder with Twenty Fourteen, the theme expects widgets to only be in certain areas causing text color issues.

You’ll need a Custom CSS plugin or module. I recommend the one in Jetpack but Simple Custom CSS plugin is also fine. Insert the following:

.content .widget {
	color: #555;
}

You might need more than that later. Just let us know.