“Accordions Header Font Color” not changing tab color

The “accordion header font color” and “Accordions header font color on hover” settings don’t change the color when the “tabs” shortcode is used.

Only the “Icon color” is carried over.

Is there custom css I can add which will make the tabs header text white (default, selected, and onhover)?
This is what I currently have affecting the tabs nav, unrelated:

    .accordions-tabs .tabs-nav {
    border: none !important;
    outline: 1px solid black !important;
}

The page I need help with: [log in to see the link]