Main menu active colour. Partner logo pop-up text box – colours

Hi,
I would like to change colours in two areas, I have looked at snippets on the forum, but haven’t found anything that works for me – even with the addition of !important.
These are the areas I am trying to target:

1. The colour of active state of the main menu. ie i would like the menu tab of the active page to stay coloured while the page is open, not just on hover.
Not sure if its relevant, but I already have this added to my quick css for the background colour of the full width menu:

/* ---menu full width background colour---*/
#header_main_alternate { background-color: #0081d1; }

2. I would like to be able to edit colour of the text and background of the Partner logo and gallery pop-up text boxes. I have tried this without success:
.avia-tooltip, .avia-tooltip .avia-arrow { background: #006acff !important; }

Hope you can help,

Fiona