How to change background color of "if this is"

[uofa]

is there away to change the background color when a non regestred user visits the forum. right now it displays it as "if this is your first time...." with background color of yellow. i would like to change the color to white or transparent so it blends with the page.
https://vborg.vbsupport.ru/external/2012/10/39.png

thanks in advance

[kh99]

Assuming your guest notice is still notice id 1, you could put this in the additional.css template:
#navbar_notice_1 {
box-shadow: 0px 0px;
background-color: #ffffff;
}

[uofa]

thank you! that worked! :)