Let's get fancy: Text like tag?

Here's an alternative solution with Tikz.

Output

Code

\documentclass[margin=10pt]{standalone}
\usepackage{tikz}

\definecolor{backg}{RGB}{225,236,244}
\definecolor{tagtxt}{RGB}{88,115,159}

\newcommand\sotag[1]{%
    \tikz[baseline]{%
        \node[anchor=base, text=tagtxt, fill=backg, font=\sffamily, text depth=.5mm] {#1};
    }%
}

\begin{document}
Here are some tags: \sotag{android}, \sotag{broadcastreceiver}, and \sotag{gallery}
\end{document}

\documentclass{article}

\usepackage[skins]{tcolorbox}

\newtcolorbox{tagbox}[1][]{colback=blue!20!white,sharp corners,boxrule=0pt,enhanced jigsaw,nobeforeafter,width=3cm,halign=center,valign=center}

\newcommand{\sotagbox}[1]{%
  \begin{tagbox}
    #1
  \end{tagbox}
}

\begin{document}
\sotagbox{foo}
\end{document}

Update: With a tikz style and replacing sharp corners by arc=0pt etc.

\documentclass{article}

\usepackage[skins]{tcolorbox}


\newtcolorbox{tagbox}[1][]{
  colback=blue!20!white,
  arc=0pt,
  auto outer arc,
%  sharp corners,
  boxrule=0pt,
  enhanced jigsaw,
  nobeforeafter,
  width=2cm,
  boxsep=0pt,
  halign=center,
  valign=center,
  box align=center,
  colupper={blue!40!black}, % a dark blue
  fontupper={\bfseries},
  top=\fboxsep,
  bottom=\fboxsep,
  left=\fboxsep,
  right=\fboxsep,
  baseline=\fboxsep,
  #1
}

\newcommand{\sotagbox}[2][]{%
  \begin{tagbox}[#1]%
    #2
  \end{tagbox}%
}

\begin{document}
\sotagbox{foo} versus \colorbox{blue!20!white}{foo} and something with a shadow: \sotagbox[drop shadow]{foo}
\end{document}

You could use \colorbox{red}{text} from the standard latex color package.