Svg For UWP Converter inlines css styles to the svg elements.
The Image control supports SVG files beginning from Windows 10 Creators Update (version 1703, build 15063).
It's just a partial support of SVG Ver 1.1 specification (see SVG Support)
And it doesn't support css-like styles. If you used Adobe Illustrator for export image, you can play with export settings as described here: SVG images shown blacked out in UWP application
If you don't have an ability to use Adobe Illustrator - you may use this tool to fix the showing issues.
After installation you can use this extension via:
Let's use test svg file for image source:
Content of the file:
Result should be:
But styles aren't applied correctly:
Let's update test.svg from the context menu:
Then rebuild the project and everything looks fine!