Carousel has no light theme (with dark arrows/indicators)

Created by: michaelkrieger

Carousel has no theme where the control arrows aren't white. In this case, using a bg-light (or if someone used a bg-white) it should have black or dark grey left/right controls. Right now it's white-on-light or white-on-white and so the arrows are useless.

<div id="carouselReviews" class="carousel slide bg-light " data-ride="carousel">
  <div class="carousel-inner bg-light">
    <div class="carousel-item active">
        <div class="d-block w-100 bg-light">CONTENT</div>
    </div>
    <div class="carousel-item">
        <div class="d-block w-100 bg-light">CONTENT</div>
    </div>
    <div class="carousel-item">
        <div class="d-block w-100 bg-light">CONTENT</div>
    </div>
  <a class="carousel-control-prev" href="#carouselReviewsControls" role="button" data-slide="prev">
    <span class="carousel-control-prev-icon" aria-hidden="true"></span>
    <span class="sr-only">Previous</span>
  </a>
  <a class="carousel-control-next" href="#carouselReviewsControls" role="button" data-slide="next">
    <span class="carousel-control-next-icon" aria-hidden="true"></span>
    <span class="sr-only">Next</span>
  </a>
</div>