Spirit theme top menu - onhover colour change


1. How do I change the colour setting for the top navigation menu on hover, when I hover over the menu text. By default it is a green colour. I want to change that to a dark blue. I have edited all of the available colours already defined in the left side colour picker under Theme settings > Colors. None of these Theme settings colours are set as green.

So how can I change this onhover colour for the top menu?

2. Top left logo image - How can I increase this from the default defined width of 150? I want a larger image to show there, but it can only rescale up to 150 currently. How can I get a bigger image to show, larger than 150?