ssartjb In order to get the exact desired result as envisaged, I am afraid that this will require custom coding which is beyond level of support as this is more of customization request. In order to adapt background color spanning read-more and title while getting trigged, You can try add this to css file :
#bannerwrap .colourshift .backstretch-title ul{background: rgba(003, 087, 160, 0.5);}
or adding this :
#bannerwrap .colourshift .backstretch-title li.active,#bannerwrap .colourshift .backstretch-title li.active .zt-readmore{background: rgba(003, 087, 160, 0.5);}
and remove this :
#zentools-645 .slideshow-nav-container {
background: rgba(003, 087, 160, 0.5);
}