Crashes with Java 11+

[dblsaiko]

The program crashes on startup when running Java 11+ (tested with openjdk 11.0.6+10 and openjdk 13.0.2+8)

Using json-factory 0.4.2. Similar to #7 although doesn't look like it's exactly the same issue.

Crash log: https://paste.dblsaiko.net/awudosigir.txt

[Juuxel]

at org.pushingpixels.substance.internal.utils.SubstanceColorUtilities.getDefaultBackgroundColor(SubstanceColorUtilities.java:759)
oh no

Looks like I'm switching to another LaF (probably native tbh)