Hi , I'm working on http://ossianenterprisepark.com/Busines … ions.html. I can style the <hr> by itself, but if I add the class attribute .blue, it will not recognize the styles. Also it will recognize the width in percentage, but not the height. why would that be?

After the word 'height' you need a colon, and at the end of the class .blue you need a '}'.

If I understand correctly, you want a rectangle that goes from edge to edge that is 30px high? I would use a div instead and apply the sizes to that. Then you have access to the border properties as well. Correct your css and you are good to go.

<div class="blue></div>

Both the above answers are, of course, correct.

The <hr> element has the slight advantage of being instantly recognisable when reading an .html file, and is pretty flexible when it comes to styling, as shown on the following pages:

https://www.w3schools.com/howto/howto_css_style_hr.asp
https://www.w3schools.com/tags/tag_hr.asp

Frank