How to use a colon in lstlisting keywords?

Question

for the use of CSS code I've defined the following style:

\lstdefinelanguage{CSS}{
    sensitive=true,
    alsodigit={-},
    keywords={transform, transition-property, transition-duration, transition-timing-functio},              
    morecomment=[l]{//},
    morecomment=[s]{/*}{*/},
    morestring=[b]',
    morestring=[b]"
}

In CSS3 transform can be a keyword and a property. Therefore, both variations are shown in blue in my document.

Screenshot:

Keywords always end with a colon. Can this rule be used to prevent the properties being marked as keyword?

MWE:

\documentclass{article}

\usepackage{listings}
\usepackage{color}

\definecolor{lightgray}{rgb}{0.95, 0.95, 0.95}
\definecolor{darkgray}{rgb}{0.4, 0.4, 0.4}
\definecolor{purple}{rgb}{0.65, 0.12, 0.82}

\lstdefinelanguage{CSS}{
    keywords={color,background-image,margin,padding,font,weight,display,position,top,left,right,bottom,list,style,border,size,white,space,min,width, transform, transition, transition-property, transition-duration, transition-timing-function},
    alsodigit={-},
    sensitive=true,
    morecomment=[l]{//},
    morecomment=[s]{/*}{*/},
    morestring=[b]',
    morestring=[b]"
}

\lstset{%
    % General design
    backgroundcolor=\color{lightgray},
    basicstyle={\small\ttfamily},   
    frame=l,
    % Code design
    identifierstyle=\color{black},
    keywordstyle=\color{blue}\bfseries,
    ndkeywordstyle=\color{greenCode}\bfseries,
    stringstyle=\color{ocherCode}\ttfamily,
    commentstyle=\color{darkgray}\ttfamily,
    % Code
    language={CSS},
    tabsize=2,
    showtabs=false,
    showspaces=false,
    showstringspaces=false,
    extendedchars=true,
    breaklines=true,
    % line-numbers
    xleftmargin={0.75cm},
    numbers=left,
    stepnumber=1,
    firstnumber=1,
    numberfirstline=true,
}

\begin{document}
  \begin{lstlisting}
        #box {
            transition-property: transform;
            transition-duration: 2s;
            transition-timing-function: linear;
      }
  \end{lstlisting}
\end{document}

Answer 1

My current solution is to put a colon at the end of all the keywords and to use alsoletter={-} and alsodigit={:}.

Example:

\lstdefinelanguage{CSS}{
    keywords={transform:, transition-property:, transition-duration:, transition-timing-function:},
    sensitive=true,
    morecomment=[l]{//},
    morecomment=[s]{/*}{*/},
    morestring=[b]',
    morestring=[b]",        
    alsoletter={-},
    alsodigit={:}
}

It is very annoying but it works. It would be better if one could define everything as a keyword that is between a space and a colon.

Answer 2

Update

As suggested by Qrrbrbirlbel, the answer to your question is yes. Using moredelim=[s][]{:}{;} should do the trick, and there is no longer any need to change anything in your code. This way, anything in between and including : and ; are typeset in black.

Original Post

You can use moredelim=[is][\bfseries]{/@}{@/} in \lstdefinelanguage or \lstset. Here, the delimeters /@ and @/ are used. (You can change them with a character or combination of characters not used in the language.) They will not appear in the output but typesets any character in between them, in this case, as boldface.

The Code

Here is the full code with the parts I inserted commented.

\documentclass{article}

\usepackage{listings}
\usepackage{color}

\definecolor{lightgray}{rgb}{0.95, 0.95, 0.95}
\definecolor{darkgray}{rgb}{0.4, 0.4, 0.4}
\definecolor{purple}{rgb}{0.65, 0.12, 0.82}

\lstdefinelanguage{CSS}{
    keywords={color,background-image,margin,padding,font,weight,display,position,top,left,right,bottom,list,style,border,size,white,space,min,width, transform, transition, transition-property, transition-duration, transition-timing-function},
    alsodigit={-},
    sensitive=true,
    morecomment=[l]{//},
    morecomment=[s]{/*}{*/},
    morestring=[b]',
    morestring=[b]",
    moredelim=[is][\bfseries]{/@}{@/}, % Typesets characters between /@ and @/ delimeters in boldface.
}

\lstset{%
    % General design
    backgroundcolor=\color{lightgray},
    basicstyle={\small\ttfamily},   
    frame=l,
    % Code design
    identifierstyle=\color{black},
    keywordstyle=\color{blue}\bfseries,
    ndkeywordstyle=\color{greenCode}\bfseries,
    stringstyle=\color{ocherCode}\ttfamily,
    commentstyle=\color{darkgray}\ttfamily,
    % Code
    language={CSS},
    tabsize=2,
    showtabs=false,
    showspaces=false,
    showstringspaces=false,
    extendedchars=true,
    breaklines=true,
    % line-numbers
    xleftmargin={0.75cm},
    numbers=left,
    stepnumber=1,
    firstnumber=1,
    numberfirstline=true,
}

% See how the delimeters are used below.
\begin{document}
  \begin{lstlisting}
        #box {
            transition-property: /@transform@/;
            transition-duration: 2s;
            transition-timing-function: linear;
      }
  \end{lstlisting}
\end{document}

The Output