Hi, please try this to customize the color options:

1. open file functions/theme/options/options-config.php and find this:

array('id' => 'color1', 'value' => 'theme-color-1', 'rgb' => '#DE5F4C'),
...
array('id' => 'color10', 'value' => 'theme-color-10', 'rgb' => '#666666')

update the colour value

2. open file styles/pagebuild.css and find this:

.theme-color-1{ color:#DE5F4C;}
...
.bg-theme-color-1,.promote-hover-bg-theme-color-1:hover { background-color:#DE5F4C;}
...
.moudle .ux-btn.bg-theme-color-1 { border-color:#DE5F4C; color:#DE5F4C; }
...
.bg-theme-color-1-hover:hover{ background-color:#DE5F4C!important; border-color:#DE5F4C!important; color:#fff; }
...
.fullwidth-text-white .moudle .ux-btn.bg-theme-color-1-hover:hover{ color:#DE5F4C!important; }
...

update the colour value

Best