Stop QDialog from inheriting parent's palette.

[yogeshgokul]

Ok this is clear, you are setting some style sheet for QDialog, so every QDialog in the project will have the same style sheet.
If you want to apply the style sheet for one particular dialog, you have to do something like this:

//Lets assume your QDialog instance name is dlg.
QDialog#dlg {
    background-color: green;
}

//Lets assume your QDialog instance name is dlg.
QDialog#dlg {
    background-color: green;
}

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This will change the style sheet of only one dialog.

For more selectors here.