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<!DOCTYPE html>
<html>
<style>
div {height:50px;width:100%;}
</style>
<body>
<h1>Colors can be set using RGB values</h1>
<div style="background-color:rgb(255,0,0)"></div>
<div style="background-color:rgb(255,255,0)"></div>
<div style="background-color:rgb(0,255,0)"></div>
<div style="background-color:rgb(0,255,255)"></div>
<div style="background-color:rgb(0,0,255)"></div>
<h1 style="color:rgb(255,0,0)">Heading</h1>
<h1 style="color:rgb(255,255,0)">Heading</h1>
<h1 style="color:rgb(0,255,0)">Heading</h1>
<h1 style="color:rgb(0,255,255)">Heading</h1>
<h1 style="color:rgb(0,0,255)">Heading</h1>
</body>
</html>