sty color missing problem Beamer Poster JHR

Question

I am trying to use RJH style in beamer latex poster. However, it meets three errors when compiling. (see below, and screenshot attached)

Anyone knows how to solve this problem? Thanks in advance.

P.S. the .tex and .sty files were found here: https://tex.stackexchange.com/questions/148558/changing-block-background-color-in-beamerposter

============================================================================= beamerthemeRJH.sty:31:Package keyval Error: fg undefined ...font{footline}{fg=white,size=\normalsize} beamerthemeRJH.sty:43:Package keyval Error: bg undefined ...rge,series=\bf, bg=16colorscheme1,fg=white} beamerthemeRJH.sty:43:Package keyval Error: fg undefined ...rge,series=\bf, bg=16colorscheme1,fg=white}

Answer 1

The .sty file uses a wrong syntax, colours must be defined in the colour template, not in the font template. This means the two lines

\setbeamerfont{footline}{fg=white, size=\normalsize}
\setbeamerfont{example title}{size=\large,series=\bf,bg=i6colorscheme1,fg=white}

must be changed to

\setbeamerfont{footline}{size=\normalsize}
\setbeamerfont{example title}{size=\large,series=\bfseries}

In addition to this incorrect syntax, one should really not longer use the obsolete \bf command, replace all occurrences with \bfseries

Modified .sty file (to be used as \usetheme{RJHrepaired}):

\ProvidesPackage{beamerthemeRJHrepaired} % this style was created by Rob J Hyndman and is an adapation of i6dv by David Vilar

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\selectcolormodel{cmyk}
\mode<presentation>

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% custom colors
\definecolor{i6blue}{cmyk}{1,0.305,0,0.06}
\definecolor{i6bluedark}{rgb}{0.0156,0.2578,0.5625} 
\definecolor{i6colorscheme1}{HTML}{FF6518}  % e.g. for block title
\definecolor{i6colorblockbg}{HTML}{0033cc}
\definecolor{i6colorblockfg}{HTML}{FCE94F}
\definecolor{i6colorscheme2}{HTML}{000000}  % e.g. title in headline
\definecolor{i6colorscheme3}{HTML}{C3DFFF}  % e.g. for poster background
\definecolor{i6colorscheme4}{HTML}{000000} 
\definecolor{i6colorschemeHeadline}{HTML}{0033cc}  % for headline bg
\definecolor{i6colorschemeFootline}{HTML}{100D09}  % for headline bg

% headline colors and fonts
\setbeamercolor{headline}{fg=white,bg=i6colorschemeHeadline}
\setbeamercolor{title in headline}{fg=white}
\setbeamercolor{author in headline}{fg=lightgray}
\setbeamercolor{institute in headline}{fg=lightgray}
\setbeamercolor{logo in headline}{fg=black,bg=lightgray}
\setbeamercolor{separation line}{bg=i6colorscheme1}

% footline colors and fonts
\setbeamercolor{footline}{fg=white,bg=i6colorschemeHeadline}
\setbeamerfont{footline}{size=\normalsize}

% body colors and fonts
\setbeamercolor*{normal text}{fg=black,bg=i6colorscheme3}

% block environment
\setbeamercolor*{block body}{bg=white,fg=black}
\setbeamercolor*{block title}{fg=i6colorblockfg,bg=i6colorblockbg}
\setbeamerfont{block title}{size=\large,series=\bfseries}

% example environment
\setbeamercolor*{example title}{fg=white,bg=i6colorscheme1}
\setbeamerfont{example title}{size=\large,series=\bfseries}

\setbeamercolor{alerted text}{fg=i6colorscheme1}

\setbeamertemplate{itemize items}[triangle]
\setbeamertemplate{navigation symbols}{}  % no navigation on a poster

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{block begin}{
  \vskip.75ex
  \begin{beamercolorbox}[leftskip=1cm,colsep*=.75ex]{block title}%
    \usebeamerfont*{block title}\insertblocktitle
  \end{beamercolorbox}%
  {\ifbeamercolorempty[bg]{block body}{}{\nointerlineskip\vskip-0.5pt}}%
  \usebeamerfont{block body}%
  \begin{beamercolorbox}[colsep*=.75ex,sep=.75ex,vmode]{block body}%
    \ifbeamercolorempty[bg]{block body}{\vskip-.25ex}{\vskip-.75ex}\vbox{}%
  }
  \setbeamertemplate{block end}{
  \end{beamercolorbox}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{headline}{  
  \leavevmode

  \begin{beamercolorbox}[wd=\paperwidth]{headline}
                \centering
        \vskip2ex
        \usebeamercolor{title in headline}{\color{fg}\textbf{\LARGE{\inserttitle}}\\[1ex]}
        \usebeamercolor{author in headline}{\color{fg}\large{\insertauthor}\\[1ex]}
  \end{beamercolorbox}

  \begin{beamercolorbox}[wd=\paperwidth]{lower separation line head}
    \rule{0pt}{2pt}
  \end{beamercolorbox}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setbeamertemplate{footline}{
  \begin{beamercolorbox}[wd=\paperwidth]{upper separation line foot}
    \rule{0pt}{2pt}
  \end{beamercolorbox}

  \begin{beamercolorbox}[ht=4ex,leftskip=1cm,rightskip=1cm]{footline}%
    \hfill \raisebox{-0.4cm}{\insertfooter}
    \vskip1ex
  \end{beamercolorbox}

  \begin{beamercolorbox}[wd=\paperwidth]{lower separation line foot}
    \rule{0pt}{2pt}
  \end{beamercolorbox}
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\mode<all>

\def\footer#1{\def\insertfooter{#1}}