-- font sizes ranging from 12px - 52px,
-- 10 colors
-- different types of margin/padding
-- different styles like uppercase, bold, thin etc etc.

.heading--s12 { font-size: 12px; }
.heading--s15 { font-size: 15px; }
...
.heading-blu { color: blue; }
.heading-green { color: green; }
...
.heading-bold { font-weight: bold; }
...
.block-mtb10 { margin-top: 10px; margin-bottom: 10px; }
.block-mtb20 { margin-top: 20px; margin-bottom: 20px; }
...

<h1 class="heading--s15 heading--blu">Heading 1</h1>
<h1 class="heading--s15 heading--green block-mtb20">Margin top n bottom 20px</h1>
<h1 class="heading--s15 heading--blu block--m20">Margin 20px</h1>
<h1 class="heading--s15 heading--blu block--pt10">Padding top 10px</h1>
...