\newcommand{\itemclass}[1]
{
	\setlist[itemize,1]{label={\color{#1}\textbullet}}
	\setlist[itemize,2]{label={\color{#1}$\rightarrow$}}
	\setlist[enumerate,1]{label=\fcolorbox{#1}{#1}{\arabic*},font=\color{white}\normalsize\bfseries}
	\setlist[enumerate,2]{label=\textcolor{#1}{\alph*.},font=\normalsize\bfseries}
}

\itemclass{black}{}
