The Troubleshooting (artwork) Post

I've been messing around with svg art using Inkscape. For whatever reason, when I upload these images they look fine on a desktop device, but are dark grey on a black background on mobile devices. I think I either uploaded some .pngs or perhaps forgot to flatten the image when going to .jpg.

Anyway this a test of 2 Skimmer ground cars.

These are 3 Greek soldiers. 

These figures have been a part of my Strictly (Duke) Springer posts, which I hope to fix soon. 

I'd like to scale them down to 1/4 and 1/2 sizes for counters.