color error with marginpar in classicthesis

Question

I have reduced my problem to this short document:

\documentclass{scrartcl}
\usepackage{xcolor}
\usepackage[nochapters]{classicthesis}

\begin{document}
Consideriamo un esempio.
\marginpar{nota}
\end{document}

which, in my installation, produces the following error:

! Package xcolor Error: Undefined color `Black'.

Cannot understand how to fix this. Here is the complete log: https://drive.google.com/open?id=0BwkxkVFUbSmjM2hCQm8zMUZsLTA

Answer 1

classicthesis.sty already loads the package xcolor for you, with this option:

\PassOptionsToPackage{dvipsnames}{xcolor}
\RequirePackage{xcolor}

Just remove the call to xcolor from your document and it will work.

Answer 2

For some reason a package wanted to use a color named Black, which is not the standard defined color, black. Thus, I just created the color Black using a \colorlet{}{}and all are happy.

\documentclass{scrartcl}
\usepackage{xcolor}
\colorlet{Black}{black}
\usepackage[nochapters]{classicthesis}
\begin{document}
Consideriamo un esempio.
\marginpar{nota}
\end{document}