OK, I have made a darker theme available to everyone. To change your current theme to the darker theme do the following:
Profile (Just click the button, do not look at the drop down menu)
Look and Layout
Current Theme (At the top, just click Change)
From there you can see the available themes and you can choose the one you want. Hopefully that darker one will be a good option. I can look for one with more gray than black if you like.
We can have as many themes installed as options that we like. They will not quite be as specialized as this theme. For example, I am not sure how to add the Tennis4you logo at the top of the darker theme yet. It just says "Tennis4you Forums" in plain text for now.