OO Approach:

.base-h1-style {margin: 10px; padding: 5px; color: #333333; font-size: 12px;}

#title-home {color: green;}
#title-content {color: red;}
#title-product {color: blue; font-size: 14px;}


Pragmatic Approach:

#title-home {margin: 10px; padding: 5px; color: #333333; font-size: 12px; color: green;}
#title-content {margin: 10px; padding: 5px; color: #333333; font-size: 12px; color: blue;}
#title-product {margin: 10px; padding: 5px; color: #333333; font-size: 14px; color: red;}