Changing page numbering does only work for two arabic numbered pages

Question

I am using the code below to change the style of my page numbering. This works quite well. But only for the first two arabic numbered pages. That means page 1 and page 2 are showed correctly. all other pages are missing the blue line as you can see in the pictures.

ToC and ToT and ToP are numbered roman and there the code works without problems.

Any ideas? thanks

\fancypagestyle{plain}{%
    \fancyhf{}
    \fancyfootoffset[OR]{1.85cm}
    \fancyfoot[OR]{%
        {\ }%\tgherosfont%
        {\color{chaptercolor}\rule[-90pt]{0.8mm}{100pt}}%
        \hspace*{10pt}\begin{minipage}[b]{1.5cm}%
            \color{chaptercolor}\normalsize\textbf{\thepage}%
        \end{minipage}%
    }
    \fancyfootoffset[EL]{1.85cm}
    \fancyfoot[EL]{%
        %\tgherosfont%
        \begin{minipage}[b]{1.5cm}%
            \raggedleft\color{chaptercolor}\normalsize\textbf{\thepage}%
        \end{minipage}%
        \hspace*{10pt}{\color{chaptercolor}\rule[-90pt]{0.8mm}{100pt}}%
    }
    \renewcommand{\headrulewidth}{0pt}
    \renewcommand{\footrulewidth}{0pt}
}

Answer 1

To use the style for all pages and not only for plain:

\documentclass{book}

\usepackage{fancyhdr}
\usepackage{xcolor}
\colorlet{chaptercolor}{blue}

\fancypagestyle{plain}{%
    \fancyhf{}
    \fancyfootoffset[OR]{1.85cm}
    \fancyfoot[OR]{%
        {\ }%\tgherosfont%
        {\color{chaptercolor}\rule[-90pt]{0.8mm}{100pt}}%
        \hspace*{10pt}\begin{minipage}[b]{1.5cm}%
            \color{chaptercolor}\normalsize\textbf{\thepage}%
        \end{minipage}%
    }
    \fancyfootoffset[EL]{1.85cm}
    \fancyfoot[EL]{%
        %\tgherosfont%
        \begin{minipage}[b]{1.5cm}%
            \raggedleft\color{chaptercolor}\normalsize\textbf{\thepage}%
        \end{minipage}%
        \hspace*{10pt}{\color{chaptercolor}\rule[-90pt]{0.8mm}{100pt}}%
    }
    \renewcommand{\headrulewidth}{0pt}
    \renewcommand{\footrulewidth}{0pt}
}


\pagestyle{fancy}
\fancyhf{}
\fancyfootoffset[OR]{1.85cm}
\fancyfoot[OR]{%
    {\ }%\tgherosfont%
    {\color{chaptercolor}\rule[-90pt]{0.8mm}{100pt}}%
    \hspace*{10pt}\begin{minipage}[b]{1.5cm}%
        \color{chaptercolor}\normalsize\textbf{\thepage}%
    \end{minipage}%
}
\fancyfootoffset[EL]{1.85cm}
\fancyfoot[EL]{%
    %\tgherosfont%
    \begin{minipage}[b]{1.5cm}%
        \raggedleft\color{chaptercolor}\normalsize\textbf{\thepage}%
    \end{minipage}%
    \hspace*{10pt}{\color{chaptercolor}\rule[-90pt]{0.8mm}{100pt}}%
}
\renewcommand{\headrulewidth}{0pt}
\renewcommand{\footrulewidth}{0pt}

\usepackage{blindtext}

\begin{document}

\tableofcontents

\Blinddocument


\end{document}

(instead of creating this layout yourself, you could also use the cleanthesis package which has such page number per default)