Classicthesis chapter number gets black

Question

The chapter number is black, but it should be light gray. I have not modified anything in the layout files and have downloaded fresh one. Has anyone got a clue where I can change to adjust the color back to light gray?

Answer 1

This is the code that classicthesis uses to set the chapternumber:

\titleformat{\chapter}[display]%
    {\relax}{\mbox{}\oldmarginpar{\vspace*{-3\baselineskip}\color{halfgray}\chapterNumber\thechapter}}{0pt}%
    {\raggedright\spacedallcaps}[\normalsize\vspace*{.8\baselineskip}\titlerule]% 

There are no options in classicthesis to alter the colour of the chapter number, so unless you changed it in those lines, one of your packages and/or changes are responsible for the black number.

You could add the following to your preamble, which would "reset" the original code at the beginning of the document. So if you (or one of your packages) are responsible for the black colour, this should reset the changes.

\AtBeginDocument{%
    \titleformat{\chapter}[display]%
        {\relax}{\mbox{}\oldmarginpar{\vspace*{-3\baselineskip}\color{halfgray}\chapterNumber\thechapter}}{0pt}%
        {\raggedright\spacedallcaps}[\normalsize\vspace*{.8\baselineskip}\titlerule]%
}

Note that this is not a fix. A fix would be to construct an MWE in order to find out how the error occured in the first place.