Title BG Colour / Bespoke Taxonomies / Navigation Buttons

Hi all

I have recently installed the Parabola theme on my website http://www.trancefixxed.co.uk/ and I’ve got it mostly working the way I want, but have a few (hopefully straightforward) questions:

01 – How do you change the colour of the background of the ‘Title’ text (which appears with mouse-over) for the Presentation Columns?
(Currently white)

02 – On my previous (child) theme, I added code for bespoke taxonomies in the functions.php file, but this doesn’t seem to work Parabola. Which PHP file should I added the code to?
Code I was using is:

// Add bespoke taxonomies

add_action( 'init', 'create_my_taxonomies', 0 );

function create_my_taxonomies() {
	register_taxonomy( 'artist', 'post', array( 'hierarchical' => false, 'label' => 'Artist', 'query_var' => true, 'rewrite' => true ) );
	register_taxonomy( 'genre', 'post', array( 'hierarchical' => false, 'label' => 'Genre', 'query_var' => true, 'rewrite' => true ) );
	register_taxonomy( 'year', 'post', array( 'hierarchical' => false, 'label' => 'Year Released', 'query_var' => true, 'rewrite' => true ) );
}

03 – If I view a Category page (eg. http://www.trancefixxed.co.uk/category/review/ at the bottom there are 1 2 3 etc buttons to navigate to older posts. On the presentation page I have “Show Posts” enabled but these navigation buttons are missing. Any ideas how I add them?