If You Have Forms, Use Colored Input Fields!
One thing that makes your web site standing out is to use colored input fields in a form. This is rarely used, yet quite simple. Example:
<INPUT TYPE="text" ...
STYLE="color: #...; font-family: ...; font-weight: ...; font-size: ...px;
background-color: #...;">
By attribute "STYLE="..." you can declare any combination of text color (color: #...;), background color (background-color: #...;), font (font-family: ...; font-weight: ...; font-size: ...px;), etc. Don't forget to keep all the STYLE elements separated by a semi-colon (;). Numbers headed by "#" are hexadecimal-numbers, as usual when declaring a color in HTML. The suffix px in font-size: means "pixels".
For details refer to a good HTML tutorial.