putting color in a forms input field

[4SeeN]

I noticed some forms on websites have color in the fields that required... how would i go about putting color in those field?

an example is this form:

http://www.system0.net/scripts/simpl...rm_example.php

[Frozentoast]

Try this

[4SeeN]

When i view the form i have on my computer it contains the color in the text fields.. but when i upload the page.. and view it on the internet.. it has no color..