\input regression-test.tex
\documentclass{article}
\usepackage{osgstyler}

\begin{document}
\START
\UseOsgColorPalette{osl-standard}
\UseOsgFontPalette{osl-standard}
\ExplSyntaxOn
\TYPE{standard-primary=\OsgColorName{primary}}
\extractcolorspec{\OsgColorName{primary}}\l_tmpa_tl
\TYPE{standard-primary-value=\l_tmpa_tl}
\ExplSyntaxOff
\UseOsgColorPalette{osl-modern}
\UseOsgFontPalette{osl-modern}
\ExplSyntaxOn
\extractcolorspec{\OsgColorName{primary}}\l_tmpa_tl
\TYPE{modern-primary-value=\l_tmpa_tl}
\TYPE{osl-modern-itemize-1-stored=\prop_item:Nn \g__osgstyler_list_palette_prop { osl-modern/itemize/1 }}
\ExplSyntaxOff
\UseOsgListPalette{osl-modern}
\TYPE{done}
\END
\end{document}