Hello.
So, you want to change background color and foreground color of "User name" and "Password" labels on Logon form web part?
If so, you can do it in
/CMSWebParts/Membership/Logon/LogonForm.ascx file, where both labels are defined, adding
BackColor="Black" ForeColor="White" properties for proper controls. For example:
<cms:LocalizedLabel ID="lblUserName" runat="server" AssociatedControlID="UserName"
EnableViewState="false" BackColor="Black" ForeColor="White"/>
<cms:LocalizedLabel ID="lblPassword" runat="server" AssociatedControlID="Password"
EnableViewState="false" BackColor="Black" ForeColor="White"/>
Best Regards,
Radek Macalik