PyQt5 – Background color of intermediate Check Box

In this article we will see how to set color to the check box i.e to the label part when the check box is in intermediate state. We can set background color to the check box but that will remain same for all the states. Intermediate state is a state inbetween checked and unchecked state it is the third state which is created with the help of setTristate method. In order to set background color for the intermediate state we have to change the style sheet of the label part in the indeterminate(intermediate) state. Below is the style sheet code.

QCheckBox::indeterminate
{
background-color : cyan;
}

Below is the implementation. 

Python3

# importing libraries
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui
from PyQt5.QtGui import *
from PyQt5.QtCore import *
import sys


class Window(QMainWindow):

    def __init__(self):
        super().__init__()

        # setting title
        self.setWindowTitle("Python ")

        # setting geometry
        self.setGeometry(100, 100, 600, 400)

        # calling method
        self.UiComponents()

        # showing all the widgets
        self.show()

    # method for widgets
    def UiComponents(self):
        # creating the check-box
        checkbox = QCheckBox('Geek ?', self)

        # setting tristate check box
        checkbox.setTristate(True)

        # setting geometry of check box
        checkbox.setGeometry(200, 150, 100, 30)

        # adding background color to the pressed check box label part
        # when it is in intermediate state
        checkbox.setStyleSheet("QCheckBox:indeterminate"
                               "{"
                               "background-color : cyan;"
                               "}")


# create pyqt5 app
App = QApplication(sys.argv)

# create the instance of our Window
window = Window()

# start the app
sys.exit(App.exec())

Output :