Html Color Code for Transparent Options

[NovaArgon]

I am working on the style for my phpbb3 forums and I am trying to make some parts of the forum transparent using css is there such thing as a transparent color html color code?

THanks

[NovaArgon]

Thanks so much Pandy your rock!

I am trying it but I must be putting my code in wrong.

do you see what the problem is?

}

.navbar {
background-color: 'transparent';
}