The box is coming from this CSS rule in style.css
a:focus {
outline: solid 1px !important;
}
The color is coming from this rule Looks like something in woocommerce configuration.
element.style {
}
#site-logo #site-logo-inner a {
background-color: transparent !important;
}
.woocommerce-MyAccount-navigation ul li a:before, .woocommerce-checkout .woocommerce-info a, .woocommerce-checkout #payment ul.payment_methods .wc_payment_method>input[type=radio]:first-child:checked+label:before, .woocommerce-checkout #payment .payment_method_paypal .about_paypal, .woocommerce ul.products li.product li.category a:hover, .woocommerce ul.products li.product .button:hover, .woocommerce ul.products li.product .product-inner .added_to_cart:hover, .product_meta .posted_in a:hover, .product_meta .tagged_as a:hover, .woocommerce div.product .woocommerce-tabs ul.tabs li a:hover, .woocommerce div.product .woocommerce-tabs ul.tabs li.active a, .woocommerce .oceanwp-grid-list a.active, .woocommerce .oceanwp-grid-list a:hover, .woocommerce .oceanwp-off-canvas-filter:hover, .widget_shopping_cart ul.cart_list li .owp-grid-wrap .owp-grid a.remove:hover, .widget_product_categories li a:hover ~ .count, .widget_layered_nav li a:hover ~ .count, .woocommerce ul.products li.product:not(.product-category) .woo-entry-buttons li a:hover, a:hover, a.light:hover, .theme-heading .text::before, .theme-heading .text::after, #top-bar-content >a:hover, #top-bar-social li.oceanwp-email a:hover, #site-navigation-wrap .dropdown-menu >li >a:hover, #site-header.medium-header #medium-searchform button:hover, .oceanwp-mobile-menu-icon a:hover, .blog-entry.post .blog-entry-header .entry-title a:hover, .blog-entry.post .blog-entry-readmore a:hover, .blog-entry.thumbnail-entry .blog-entry-category a, ul.meta li a:hover, .dropcap, .single nav.post-navigation .nav-links .title, body .related-post-title a:hover, body #wp-calendar caption, body .contact-info-widget.default i, body .contact-info-widget.big-icons i, body .custom-links-widget .oceanwp-custom-links li a:hover, body .custom-links-widget .oceanwp-custom-links li a:hover:before, body .posts-thumbnails-widget li a:hover, body .social-widget li.oceanwp-email a:hover, .comment-author .comment-meta .comment-reply-link, #respond #cancel-comment-reply-link:hover, #footer-widgets .footer-box a:hover, #footer-bottom a:hover, #footer-bottom #footer-bottom-menu a:hover, .sidr a:hover, .sidr-class-dropdown-toggle:hover, .sidr-class-menu-item-has-children.active >a, .sidr-class-menu-item-has-children.active >a >.sidr-class-dropdown-toggle, input[type=checkbox]:checked:before {
color: #ef3f49;
}