HEX Shades of gray

By using equal values for red, green, and blue, you will get different shades of gray:

#3c3c3c

#616161

#787878

#b4b4b4

#f0f0f0

#f9f9f9

The inline styles used on this page

<h2 style="background-color:#3c3c3c; color: #FF0000;">
<h2 style="background-color:#616161; color: #FF0000;">
<h2 style="background-color:#787878; color: #FF0000;">
<h2 style="background-color:#b4b4b4;">
<h2 style="background-color:#f0f0f0;">
<h2 style="background-color:#f9f9f9;">