Custom CSS Edits to template

Hi,

I'm wanting to edit the template to fully merge in with my website, my usual methods aren't working. The .css files in '/media' folder don't seem to update.

The font for EasyDiscuss doesn't inherit from my native template font, and some basic colours I'd also like to change too.

I had a response via the contact form which suggested this:

To custom the styles of EasyDiscuss, you can insert a custom.css into templates stylesheets,

e.g.:
/templates/[YOURTEMPLATES]/html/com_easydiscuss/css/custom.css
body #ed {
background-color: red;
}

I have tried this but it doesn't seem to work. Please help me out.

I basically want to change the background colours on the dark template:

#222222 to #111720
#333333 to #191e25

and the font to 'Electrolize'