[Tex/LaTex] How to decrease vertical space of shaded(\usepackage{framed}) environment

Question

How to decrease the vertical space of shaded environment in preamble?
Here is the code:

\documentclass[a4paper,12pt]{article}
\usepackage{color,xcolor}
\usepackage{framed}
\colorlet{shadecolor}{blue!11}

\begin{document}
text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text 
\begin{shaded}
text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text
\end{shaded}
text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text

text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text
\end{document} 

Please don't define the new environment, just change some properties of shaded environment.

Answer 1

Off topic: Do not load color but just the more modern xcolor.

You can redefine the vertical space by redefining the framed-internal length OuterFrameSep:

\documentclass[a4paper,12pt]{article}
\usepackage{xcolor}
\usepackage{framed}
\colorlet{shadecolor}{blue!11}
\setlength{\OuterFrameSep}{0pt}

\begin{document}
    text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text 
    \begin{shaded}
        text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text
    \end{shaded}
    text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text

    text text text text text text text text text text text text text text text text text text text text text text text text text text text text texttext text text text text text text
\end{document}