how to change the color of a placeholder svg image?

[davidmaxwaterman]

Description

Can't style placeholder svg image

Expected outcome

Way to style placeholder svg

Actual outcome

Nothing I try has any effect - tried the documented --iron-image-placeholder mixin, with both 'color: red' and also 'fill: red', to no effect.

Live Demo

https://jsbin.com/gudiyof/edit?html
The example URL doesn't seem to work, but at least you can see the code.

Steps to reproduce

1. Put an svg placeholder as a data URL.
2. Attempt to change its color.

#84 seems related.