Can't find at css

Need a link to your site to ensure using the correct CSS. And show a page with a Table with your problem.

sure.
https://www.capgirats.cat/capgirats-web-2015/

If you look at “Contacta” you will see at the end of the page the bar i was talking about, just under the Send Button “Eviar”.
https://capgirats.cat/capgirats-web-2015/contacta/

Also you can see it and this page:
https://capgirats.cat/capgirats-web-2015/la-junta-directiva/

Try this:

table {
    border-bottom: none;
}

Thanks. It worked!

The color was defined in rgba instead of hex. For this reason I could’nt find it.

Now I’ve learned new things. Thanks again, rdellconsulting!