I always include a custom style sheet with my themes for customization, but it looks like your theme has an additional style section built into the admin that places the code into the page head.
<style type="text/css" media="screen">
::-webkit-scrollbar {width: 8px; height:8px; }
#main-nav,.cat-box-content,#sidebar .widget-container,.post-listing {border-bottom-color: #ef3636;}
.search-block .search-button,
#topcontrol,
#main-nav ul li.current-menu-item a,
#main-nav ul li.current-menu-item a:hover,
#main-nav ul li.current-menu-parent a,
#main-nav ul li.current-menu-parent a:hover,
#main-nav ul li.current-page-ancestor a,
#main-nav ul li.current-page-ancestor a:hover,
.pagination span.current,
.share-post span.share-text,
.flex-control-paging li a.flex-active,
.ei-slider-thumbs li.ei-slider-element,
.review-percentage .review-item span span,.review-final-score ,
.woocommerce span.onsale, .woocommerce-page span.onsale ,
.woocommerce .widget_price_filter .ui-slider .ui-slider-handle, .woocommerce-page .widget_price_filter .ui-slider .ui-slider-handle {
background-color:#ef3636 !important;
}
::-webkit-scrollbar-thumb{background-color:#ef3636 !important;}
footer#theme-footer, .top-nav, .top-nav ul li.current-menu-item:after,#main-nav ul li.mega-menu .mega-menu-block, #main-nav ul ul {border-top-color: #ef3636;}
.search-block:after {border-right-color:#ef3636;}
#main-nav ul > li.parent-list:hover > a:after{border-color:transparent transparent #ef3636;}
body {
background-image : url(https://www.parkerliveonline.com/wp-content/themes/sahifa/images/patterns/body-bg7.png);background-position: top center;
}
body.single .entry, body.page .entry{
font-size : 15px;
}
a {
color: #000000; }
a:hover {
color: #ff0a1e; text-decoration: underline;}
body.single .post .entry a, body.page .post .entry a {
color: #ff0a1e; }
body.single .post .entry a:hover, body.page .post .entry a:hover {
text-decoration: underline;}
</style>