Example styles for Mina olen child theme. You can use them as a starting point when creating your custom child theme.

example-styles.css

/**
 * You can use these styles as a starting point in your child theme styles.
 * I have collected all the backgrounds and colors used in Mina olen theme in this file.
 *
 */


/* === Backgrounds and colors === */

/* Blockquote. */
blockquote {
	background: #f6f6f6;
}

/* Pre. */
pre {
	background: #f4f2f2;
}

/* Buttons. */
button,
input[type="button"],
input[type="reset"],
input[type="submit"],
.mina-olen-project-url a.kalervo-portfolio-item-link,
a.mina-olen-callout-button,
body .edd-submit.button.mina-olen-theme-color,
body .edd-submit.mina-olen-theme-color,
body input[type="submit"].edd-submit.mina-olen-theme-color,
body .mina-olen-theme-color#edd-purchase-button {
	background: #c84d29;
	color: #fff;
}
button:hover,
input[type="button"]:hover,
input[type="reset"]:hover,
input[type="submit"]:hover,
.mina-olen-project-url:hover,
a.mina-olen-callout-button:hover,
button:focus,
input[type="submit"]:focus,
input[type="button"]:focus,
input[type="reset"]:focus,
.mina-olen-project-url:focus,
a.mina-olen-callout-button:focus,
button:active,
input[type="submit"]:active,
input[type="button"]:active,
input[type="reset"]:active,
.mina-olen-project-url:active,
a.mina-olen-callout-button:active,
body .edd-submit.button.mina-olen-theme-color:hover,
body .edd-submit.mina-olen-theme-color:hover,
body input[type="submit"].edd-submit.mina-olen-theme-color:hover,
body .mina-olen-theme-color#edd-purchase-button:hover,
body .edd-submit.button.mina-olen-theme-color:focus,
body .edd-submit.mina-olen-theme-color:focus,
body .mina-olen-theme-color#edd-purchase-button:focus,
body input[type="submit"].edd-submit.mina-olen-theme-color:focus,
body .edd-submit.button.mina-olen-theme-color:active,
body .edd-submit.mina-olen-theme-color:active,
body input[type="submit"].edd-submit.mina-olen-theme-color:active,
body .mina-olen-theme-color#edd-purchase-button:active {
	background: #bf421d;
}

/* Screen reader. */
.screen-reader-text:focus {
	background-color: #f1f1f1;
	color: #21759b;
}

/* Container. */
#container.mina-olen-boxed {
	background: #fff;
}

/* Sidebars. */
#sidebar-subsidiary,
#sidebar-header {
	background: #f6f6f6;
	color: #9f9f9f;
}

/* Callout. */
#mina-olen-callout-url {
	background: #f6f6f6;
	color: #999;
}
.custom-header-image #mina-olen-callout-url {
	background: #111;
	background: rgba(0,0,0,0.4);
	color: #fff;
}
#mina-olen-callout-url a {
	color: #fff;
}

/* Back to top. */
#back-to-top a {
	background: #c84d29;
	color: #fff;
}
#back-to-top a:hover,
#back-to-top a:active,
#back-to-top a:focus {
	background: #bf421d;
}

/* Menu primary. */
@media screen and (max-width: 899px) {

	#menu-primary #menu-primary-search.opened,
	#menu-primary #menu-primary-search li.menu-item-has-children > ul.sub-menu.opened {
		background: #fff;
	}
	
	#menu-primary #menu-primary-search li.menu-item-has-children > .sub-menu-indicator:after {
		background: #f6f6f6;
		color: #c84d29;
	}
	
	#menu-primary #menu-primary-search li.current-menu-item > a,
	#menu-primary #menu-primary-search li.current-menu-item ul.sub-menu > a,
	#menu-primary #menu-primary-search li a:hover,
	#menu-primary #menu-primary-search li a:active,
	#menu-primary #menu-primary-search li a:focus {
		color: #c84d29;
	}

}

@media screen and (min-width: 900px) {

	#menu-primary.fixed {
		background: #fff;
		background: rgba(255,255,255,0.97);
	}
	.ie9 #menu-primary {
		background: #fff;
	}
	
	.bottom-line.hover {
		background: #fff;
		background: rgba(255, 255, 255, 0.97);
	}
	
	#menu-primary li li a {
		color: #656565;
	}
	
	/* Root Menu Hover Persistence. */
	#menu-primary ul a:hover,
	#menu-primary ul li:hover a,
	#menu-primary li.current-menu-item a,
	#menu-primary ul li.iehover a {
		background: #f6f6f6;
		color: #c84d29;
	}
	
	/* 2nd Menu */
	#menu-primary ul li:hover li a {
		background: none;
		color: #656565;
	}
	
	/* Current menu item in sub menu. */
	#menu-primary ul.sub-menu li.current-menu-item a,
	#menu-primary ul li.iehover li.current-menu-item a {
		background: none;
		color: #c84d29;
	}

	/* 2nd Menu Hover Persistence */
	#menu-primary ul li:hover li a:hover,
	#menu-primary ul li:hover li:hover a,
	#menu-primary ul li.iehover li a:hover,
	#menu-primary ul li.iehover li.iehover a {
		background: none;
		color: #c84d29;
	}
	
}

#menu-primary .toggle-search-form {
	background-color: transparent;
}
#menu-primary .toggle-search-form.add-width {
	background-color: #fff;
}
#menu-primary .search-form input[type="search"] {
	background-color: transparent;
}
#menu-primary .search-form.add-width {
	background: #fff;
}

/* Archives. */
.archive-portfolio_item .entry:nth-child(2n+2),
.taxonomy-portfolio .entry:nth-child(2n+2),
.archive-download .entry:nth-child(2n+2),
.taxonomy-download_category .entry:nth-child(2n+2),
.taxonomy-download_tag .entry:nth-child(2n+2),
.page-template-front-page .entry:nth-child(2n+2) {
	background: #f6f6f6;
}

/* Sticky. */
.sticky,
.super-sticky {
	background: #f6f6f6;
}


/* Page links. */
.page-links a {
	background: #f6f6f6;
}

/* Loop nav. */
.loop-nav a[rel="prev"]::before,
.loop-nav a[rel="next"]::after,
.loop-pagination a.prev::before,
.loop-pagination a.next::after,
.bbp-pagination-links .page-numbers {
	background: #f6f6f6;
}

.loop-pagination a.page-numbers {
	background: #f6f6f6;
}

/* Page templates. */
.page-template-front-page #mina-olen-latest-posts.entry .entry,
.page-template-front-page #mina-olen-latest-portfolio_items.entry .entry,
.page-template-front-page #mina-olen-latest-downloads.entry .entry,
.page-template-front-page #mina-olen-latest-testimonials.entry .entry {
	background: none;
}

/* Gravity forms. */
body #gforms_confirmation_message {
	background: #f1f1f1;
}

/* Whistles. */
.whistles-tabs .whistles-tabs-nav li a {
	background: #f6f6f6;
}
.whistles-tabs .whistles-tabs-nav li a:hover {
	background: #f9f9f9;
	color:  #555;
}
.whistles-tabs .whistles-tabs-nav li[aria-selected="true"] a {
	background: #fff;
	border-bottom-color: #fff;
	color: #555;
}
.whistles-toggle .whistle-title,
.whistles-accordion .whistle-title {
	background: #f6f6f6;
	border-top-width: 0;
}
.whistles-toggle .whistle-title:hover,
.whistles-toggle .whistle-title[aria-selected="true"],
.whistles-accordion .whistle-title:hover, 
.whistles-accordion .whistle-title[aria-selected="true"] {
	background: #ededed;
	color: #555;
}


/* === Colors === */

/* Body. */
body {
	color: #656565;
}

/* Links. */
a,
a:visited {
	color: #c84d29;
}
a:hover,
a:focus,
a:active {
	color: #bf421d;
}

/* Headers. */
h1,
h2,
h3,
h4,
h5,
h6 {
	color: #353232;
}

/* Input, textarea. */
input,
textarea {
	color: #555;
}

/* Captions. */
.wp-caption-text {
	color: #999;
}

/* Widget title. */
.widget-title {
	color: #353232;
}

/* Site description. */
#site-description {
	color: #999;	
}

/* Footer content. */
#footer .footer-content {
	color: #9f9f9f;
}

/* Menu primary link. */
#menu-primary a {
	color: #656565;
}

/* Menu subsidiary link. */
#menu-subsidiary ul li a {
	color: #656565;
}
#menu-subsidiary ul li a:hover {
	color: #c84d29;
}
#menu-subsidiary li.current-menu-item a {
	color: #c84d29;
}

/* Breadcrumb trail. */
.breadcrumb-trail {
	color: #999;
}
.breadcrumb-trail a {
	color: #656565;
}

/* Entry title. */
.entry-title {
	color: #353232;
}
.entry-title a {
	color: #353232;
}

/* Entry byline. */
.entry-byline {
	color: #999;
}

/* Entry meta. */
.entry-meta {
	color: #999;
}

/* Loop description. */
.loop-description {
	color: #999;
}


/* === Borders === */
/* Tables */

table {
	border-right: 1px solid #eee;
}
th,
td {
	border-top: 1px solid #eee;
	border-left: 1px solid #eee;
	border-bottom: 1px solid #eee;
}

/* Forms. */
fieldset {
	border: 1px solid #eee;
}
input,
textarea {
	border: 1px solid #ccc;
}
input:focus,
textarea:focus {
	border: 1px solid #bf421d;
}

/* Boxed layout border. */
@media screen and (min-width: 1184px) {

	#container.mina-olen-boxed {
		border-left: 1px solid #eee;
		border-right: 1px solid #eee;
	}

}

/* Main, header. */
#main,
.home #header {
	border-bottom: 1px solid #eee;
}

/* Layout borders. */
@media screen and (min-width: 896px) {

	.layout-2c-l #content,
	.layout-default #content {
		border-right: 1px solid #eee;
	}
	
	.layout-2c-r #content {
		border-left: 1px solid #eee;
	}
	
	.layout-2c-l #sidebar-primary {
		border-left: 1px solid #eee;
	}
	.layout-2c-r #sidebar-primary {
		border-right: 1px solid #eee;
	}
	
}

/* Sidebars borders. */
#sidebar-subsidiary,
#sidebar-header {
	border-bottom: 1px solid #eee;
}

/* Primary menu borders. */
@media screen and (max-width: 899px) {

	#menu-primary {
		border-bottom: 1px solid #eee;
	}
	
	#menu-primary #menu-primary-search li.menu-item-has-children > .sub-menu-indicator:after {
		border-left: 1px solid #eee;
		border-right: 1px solid #eee;
	}
	
	#menu-primary #menu-primary-search li a {
		background: #fff;
		border-top: 1px solid #eee;
	}
	
	.nav-toggle:before {
		border-left: 1px solid #eee;
		border-right: 1px solid #eee;
	}
	
}

/* Minimum width of 900 pixels. */
@media screen and (min-width: 900px) {

	.bottom-line.hover {
		border-bottom: 1px solid #eee;
	}
	
	#menu-primary {
		border-bottom: 1px solid #eee;
	}
	#menu-primary li  {
		border-left: 1px solid #eee;
	}
	#menu-primary li:last-child {
		border-right: 1px solid #eee;
	}
	#menu-primary li li {
		border-left: none;
	}
	#menu-primary li li:last-child {
		border-right: none;
	}
	
}

#menu-primary .toggle-search-form {
	border-left: 1px solid #eee;
	border-right: 1px solid #eee;
}

/* Subsidiary menu. */
#menu-subsidiary {
	border-bottom: 1px solid #eee;
}

@media screen and (max-width: 899px) {

	#menu-subsidiary ul li a {
		border-bottom: 1px solid #eee;
	}
	#menu-subsidiary ul li:last-child a {
		border-bottom: none;
	}
}

@media screen and (min-width: 900px) {

	#menu-subsidiary ul li {
		border-left: 1px solid #eee;
	}
	#menu-subsidiary ul li:last-child {
		border-right: 1px solid #eee;
	}

}

/* Breadcrumbs. */
.breadcrumb-trail {
	border-top: 1px solid #eee;
	border-bottom: 1px solid #eee;
}

/* Post entry. */
.entry  {
	border-bottom: solid 1px #eee;
}

/* Loop meta. */
.loop-meta {
	border-bottom: 1px solid #eee;
}

/* Whistles. */
.whistles-tabs .whistles-tabs-nav li a {
	border: 1px solid #eee;
	border-right-width: 0;
}
.whistles-tabs .whistles-tabs-nav li[aria-selected="true"] a {
	border-bottom-color: #fff;
}
.whistles-toggle .whistle-title,
.whistles-accordion .whistle-title {
	border: 1px solid #eee;
	border-top-width: 0;
}
.whistles-toggle .whistle-content,
.whistles-accordion .whistle-content {
	border: 1px solid #eee;
}

/* Jetpack. */
body div.sharedaddy div.sd-block {
	border-top-color: #eee;
}