.uk-grid-item-match>:not([class*=uk-width]), .uk-grid-match>*>:not([class*=uk-width]) {
background-color: #001446;

    
.uk-panel>:last-child {
color: #fff;
    }
   
h3.el-title  {
       color: #fff}

p {
color: #fff}
    

section background colour changes

Section / Advanced / CSS 

/*background colour*/
.el-section {
background: #2fa836;
}

open up padding under the content of an accordion

.el-item > .uk-accordion-content {
margin-bottom: 20px;
}

Settings / Custom Code / CSS/LES

.tm-header-mobile .uk-navbar-container {
  background-color: white;
}

Then because my example is white I added a box shadow to the navbar in the same colour as the menu area bar to separate the header from the body of the site.

Inverse / Nav Default / Item Active Colour

Divider color

Base / RH / Border

Make sure Fileinfo is ticked in the PHP Selector / PHP Extensions, area of blackbarn.

Disolve one image to the next - with text over the top

Slideshow element, and select Settings > Animation > Transition: Fade.