Events Manager / Background-Color for Categories

Hi!

I am using the great EM-Plugin. Thanks for that ;).

My Problem is: Every Event should be shown as a POST with a different Category-Background-Color.

I have used following Code:

function return_category_color() {
if ( has_category( 'party' )) {
echo "color-party";
return;} 

elseif ( has_category( 'oclub' ))
{echo "color-oclub";
return;}

elseif ( has_category( 'kino' ))
{echo "color-kino";
return;}

elseif ( has_category( 'fdm' ))
{echo "color-fdm";
return;}

elseif ( has_category( 'konzert' ))
{echo "color-konzert";
return;}

elseif ( has_category( 'kiko' ))
{echo "color-kiko";
return;}

elseif ( has_category( 'restau' ))
{echo "color-restau";
return;}

elseif ( has_category( 'tanzkurs' ))
{echo "color-tanzkurs";
return;}

else {
echo "color-party";
return;
}
}

[Please post code & markup between backticks or use the code button. Your posted code may now have been permanently damaged by the forum’s parser.]

AND:

.color-party { background: #336699; color: #fafafa;}
.color-oclub { background: #ffcc00; color: #000000; }
.color-kino { background: #444444; color: #000000; }
.color-fdm { background: #777777; color: #000000; }
.color-konzert { background: #222222; color: #000000; }
.color-kiko { background: #ccccff; color: #000000; }
.color-restau { background: #ccccff; color: #000000; }
.color-tanzkurs { background: #ccccff; color: #000000; }

Now i am c o m p l e t e l y off, because i dont were i could place these Codes to. I have tried different .php and .css, but nothing worked… If someone can help, it would keep me getting squared eyes ??

Thanks Folks!
Cy.