CSS2 Box border-bottom-color Property Example:

 

Examples (inline element <font>):

This is a normal paragraph

This line has <font style="border-style: inset; border-width : 10pt; border-bottom-color: red">...</font>

This is a normal paragraph

This line has <font style="border-style: inset; border-width : 10pt; border-bottom-color: #FF0000">...</font>

This is a normal paragraph

This line has <font style="border-style: inset; border-width : 10pt; border-bottom-color: #F00">...</font>

This is a normal paragraph

This line has <font style="border-style: inset; border-width : 10pt; border-bottom-color: rgb(255,0,0)">...</font>

This is a normal paragraph

 

Examples (block element <p>):

This is a normal paragraph

This paragraph has <p style="border-style: inset; border-width : 10pt; border-bottom-color: red">...</p>

This is a normal paragraph

This paragraph has <p style="border-style: inset; border-width : 10pt; border-bottom-color: #FF0000">...</p>

This is a normal paragraph

This paragraph has <p style="border-style: inset; border-width : 10pt; border-bottom-color: #F00">...</p>

This is a normal paragraph

This paragraph has <p style="border-style: inset; border-width : 10pt; border-bottom-color: rgb(255,0,0)">...</p>

This is a normal paragraph