Duotone Custom Filter
Allows you to take black & white image and colorize it to your heart's content.
-webkit-filter: custom(url(duotone.vs) mix(url(duotone.fs) normal source-atop), 50 50 border-box, black BR BG BB, white WR WG WB);
Where all black pixels become (BR, BG, BB) and all white pixels become (WR, WG, WB)
All color components range from 0 to 255
In the index.html example provided, the SVG file is used as the source for an IMG. The SVG IMG is black and transparent. To make the transparent parts white, I set the style of the IMG to "background-color: white"
thief.svg courtesy of Igor Yanovskiy, from The Noun Project