ubuntu light-theme doesn't correctly decorate menubar for widgets that are maximized

[Wei Tsui]

OS: Ubuntu 18.04

light-themes includes Ambiance & Radiance, when opening a widget that contains menu toolbar (with global-menu disabled), the background color of menu toolbar only keeps coordinate with titlebar when the widget is not maximized. Once the widget is maximized, the background color of its menu toolbar becomes different which is ugly.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: light-themes 16.10+18.04.20180122.1-0ubuntu1
ProcVersionSignature: Ubuntu 4.13.0-32.35-generic 4.13.13
Uname: Linux 4.13.0-32-generic x86_64
ApportVersion: 2.20.8-0ubuntu8
Architecture: amd64
CurrentDesktop: MATE
Date: Tue Feb 13 14:02:20 2018
PackageArchitecture: all
SourcePackage: ubuntu-themes
UpgradeStatus: No upgrade log present (probably fresh install)

[Daniel van Vugt (vanvugt)]

Can you please provide a screenshot or photo of the problem you're describing?

[Wei Tsui (ghostplant)]

The following extra styles should be added into both Ambiance and Radiance:

# Extra theme for lightdm-gtk-greeter
.lightdm-gtk-greeter separator {
    border-style: none;
    border-width: 0px;
}

# Extra theme for mate-terminal
window.background.mate-terminal vte-terminal {
    -TerminalScreen-background-darkness: 0.95;
    background-color: #300A24;
    color: #F2F1F0;
}

# Extra theme for maximized window menubar
.maximized .menubar:not(:backdrop),
.maximized menubar:not(:backdrop) {
    background-color: @dark_bg_color;
}

# Extra theme for default textview box
.view text {
    background-color: @base_color;
    color: @text_color;
}