Change template Joomla

I use the Joomla with the template Helix. I use the custom CSS and need a few small changes here. Certainly takes no more than 10 minutes if you are familiar with it.

1. The module position page should be reduced to 25%.
2. The yellow module should be # 333333 on mouseover
3. Module blue font color #ffffff
4. Module white font color # 666666, mouseover # 333333 line between the menu items # 666666