Problem with global stylesheet

[AlaaM]

I'm trying to set a global stylesheet for all my buttons.
Doing it for a specific button like the following, works:

button->setStyleSheet(QString("QPushButton:focus {") +
                              "outline: 0;" +
                              "background-color: #" + BUTTON_HIGHLIGHT_BG_COLOR  + "; " +
                              "color: #"            + BUTTON_HIGHLIGHT_TXT_COLOR + "; " +
                              "}");

But if I make it global, in the main.cpp, like this:

qApp->setStyleSheet(QString("QPushButton:focus {") +
                                  "outline: 0;" +
                                  "background-color: #" + BUTTON_HIGHLIGHT_BG_COLOR + "; " +
                                  "color: #"            + BUTTON_HIGHLIGHT_TXT_COLOR + "; " +
                                  "}");

[the following sentence was edited]
the focused buttons get the correct font color, but always with no background (transparent?), no matter the parameter I set for the background.

How can I fix this?
Thanks

[raven-worx]

@AlaaM
if possible try to set the stylesheet on your very toplevel window (mainwindow?)
Also what Qt version are you using?

[AlaaM]

@raven-worx
Please see my edit.
The font color works. It's only the highlighted background that doesn't.
I do this in my main window.
Qt version 5.5.1

[raven-worx]

@AlaaM
i know, but i was thinking of some issue in style inheritance maybe.

[AlaaM]

Answer here:
http://stackoverflow.com/questions/35018958/global-stylesheet-isnt-fully-working

(in short: I had a stackedWidget->setStyleSheet("background-color: white;") on the loading screen. It needed to be removed or changed to: stackedWidget->setStyleSheet("QStackedWidget { background-color: white; }");)