Change contrast in beamer navigation between active and not active

I want to change the color between the active and not active menu. I can't get it to work! Its too grey. My active font is white, the not active is a little bit grey... I want it whiter...

my LaTeX code:

\definecolor{mycolor}{RGB}{0, 94, 156}

% Set up color for header and footer

\setbeamercolor{palette primary}{fg=mycolor,bg=white}

\setbeamercolor{palette secondary}{fg=white,bg=mycolor}



I tried \setbeamertemplate{section in head/foot shaded}[default][10] already but it didnt work. It has no effect?!

Edit:

The whole code:

My test document:

\documentclass{beamer}
\usepackage{graphicx}
\usepackage{graphics}
\usepackage{hyperref}
\usepackage[english]{babel}
\usepackage{eso-pic}
\usepackage{tikz}

\mode<presentation>
{
\usetheme{test}
\setbeamercovered{transparent = 28}
}

\begin{document}

\begin{frame}[plain]
\titlepage
\end{frame}

\end{document}

-
Thanks for providing a complete document. –  Gonzalo Medina Sep 6 '12 at 16:25

Putting

\setbeamertemplate{section in head/foot shaded}[default][10]


either in the file beamerthemeutlsb.styright before \mode<all> or in your test .tex file like this

\mode<presentation>
{
\usetheme{utlsb}
\setbeamercovered{transparent = 28}

produces the desired effect; here's an image of the headline I obtained from your test file showing the sections with the desired shading (I used the demo option for graphicx since I didn't have your logos):