When using the asset catalog, assigning the interpretation to Colors works fine. However assigning it as Data doesn’t compile wit the error:
Assertion failed: (maxCountIncludingZeroTerminator > 0 && tokenCount < maxCountIncludingZeroTerminator), function CUIRenditionKeyCopy, file /AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/CoreUI/CoreUI-609.4/CoreTheme/ThemeStorage/CUIThemeRendition_Support.m, line 849.
Command CompileAssetCatalog failed with a nonzero exit code
Compiling the final example project has a similar error:
2020-06-19 15:01:03.038 ibtoold[30063:2806990] NSFileCoordinator is doing nothing.
Command CompileAssetCatalog failed with a nonzero exit code