import sys import PySide6 from PySide6 import QtGui, QtWidgets from PySide6.QtCore import Qt from PySide6.QtWidgets import QApplication, QHBoxLayout, QPushButton, QVBoxLayout, QWidget, QLabel app = QApplication(sys.argv) win = QWidget() win.setWindowTitle("Hello World") win.setGeometry(100, 100, 280, 80) win.move(int(1920/2), int(1080/2)) lay = QVBoxLayout() layV = QVBoxLayout() tlb = QWidget() lst = QWidget() layH = QHBoxLayout() layH.addWidget(QPushButton("Left")) layH.addWidget(QPushButton("Center"), 1) layH.addWidget(QPushButton("Right"), 2) tlb.setLayout(layH) p = tlb.palette() p.setColor(tlb.backgroundRole(), Qt.red) tlb.setPalette(p) pal = win.palette() pal.setColor(win.backgroundRole(), Qt.red) lst.setAutoFillBackground(True) lst.setPalette(pal) lbl1 = QLabel("