Cannot change carousel control colors in v4 alpha 6

Created by: tab00

It appears that the left and right icons of the carousel are now SVG images instead of chevron characters. In the browser inspector I see the following style definition for the <span class="carousel-control-next-icon" aria-hidden="true"></span> element:

.carousel-control-next-icon { background-image: url(data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' f…%3Cpath d='M1.5 0l-1.5 1.5 2.5 2.5-2.5 2.5 1.5 1.5 4-4-4-4z'/%3E%3C/svg%3E); }

Since the icon is now an image, would this be the reason for the inability to change its color?