- Replace all \newcommands with \NewDocumentCommand.

- Add Ragged2e dependency for better alignment options.
- Refine marginalia, widow control.

packages/Color.sty

@@ -40,7 +40,7 @@
 
 \colorlet{boxedcoloroutline}{black}
 
-\newcommand{\boxedcolor}[3][\rule{0pt}{1ex}\rule{1ex}{0pt}]{%
+\NewDocumentCommand{\boxedcolor}{O{\rule{0pt}{1ex}\rule{1ex}{0pt}} m m}{%
 	\providelength[\fboxsep]{\fboxsepdefault}%
 	\providelength[\fboxrule]{\fboxruledefault}%
 	%
@@ -55,7 +55,7 @@
 
 \providelength[12.3599pt]{\warningboxsizeoffset}
 
-\newcommand{\warningbox}[2][\textwidth - \warningboxsizeoffset]{%
+\NewDocumentCommand{\warningbox}{O{\textwidth-\warningboxsizeoffset} +m}{%
 	\noindent%
 	\fcolorbox{WarningBoxFGColor}{WarningBoxBGColor}{%
 		\noindent%