So here's another easy method through which you can control and change all the settings like background color, text color size, font style etc. every time you use these boxes:
An example:
The Best way to make your dreams,
come true is to wake up.
esite4u.blogspot.com
come true is to wake up.
esite4u.blogspot.com
<div align="center">
<div style="background-color: #cccd94; border: 1px solid black; font-family: sans-serif; font-weight: bold; padding: 10px; text-align: center; text-transform: capitalize; width: 300px;">
<i>The Best way to make your dreams,
come true is to <span style="color: blue; font-weight: bolder;">wake up.</span>
esite4u.blogspot.com</i></div>
</div>
You can adjust the colored parts in the code to match your blog and requirements.