Solution of https://stackoverflow.com/questions/46039595/selection-highlight-in-pyqt4-qtablewidget-fill-selected-cells-background-with-f

main.py

import sys

from PyQt4.QtCore import *
from PyQt4.QtGui import *


class TableWidget(QTableWidget):
    def __init__(self, *args, **kwargs):
        QTableWidget.__init__(self, *args, **kwargs)

        class StyleDelegateForQTableWidget(QStyledItemDelegate):
            color_default = QColor("#aaedff")

            def paint(self, painter, option, index):
                if option.state & QStyle.State_Selected:
                    option.palette.setColor(QPalette.HighlightedText, Qt.black)
                    color = self.combineColors(self.color_default, self.background(option, index))
                    option.palette.setColor(QPalette.Highlight, color)
                QStyledItemDelegate.paint(self, painter, option, index)

            def background(self, option, index):
                item = self.parent().itemFromIndex(index)
                if item:
                    if item.background() != QBrush():
                        print("twi")
                        return item.background().color()
                if self.parent().alternatingRowColors():
                    if index.row() % 2 == 1:
                        return option.palette.color(QPalette.AlternateBase)
                return option.palette.color(QPalette.Base)

            @staticmethod
            def combineColors(c1, c2):
                c3 = QColor()
                c3.setRed((c1.red() + c2.red()) / 2)
                c3.setGreen((c1.green() + c2.green()) / 2)
                c3.setBlue((c1.blue() + c2.blue()) / 2)

                return c3

        self.setItemDelegate(StyleDelegateForQTableWidget(self))


class MyDatabase(TableWidget):
    def __init__(self, parent=None):
        super(MyDatabase, self).__init__(parent)
        self.setObjectName('myDatabase_UI')

        # ---------------------------------------------------------------------------#
        self.setColumnCount(8)
        self.setRowCount(8)

        self.setAlternatingRowColors(True)

        horizontalHeader = ["ID", "Artist", "Date", "Time", "Shot", "Mastershot", "Error_Notes", "Status"]
        self.setHorizontalHeaderLabels([each for each in horizontalHeader])
        self.setItem(0, 7, QTableWidgetItem(str("Sent for Still")))
        self.setItem(1, 7, QTableWidgetItem(str("Ready to Check")))
        self.setItem(2, 7, QTableWidgetItem(str("To Start")))
        self.setItem(3, 7, QTableWidgetItem(str("WIP")))
        self.setItem(4, 7, QTableWidgetItem(str("Revise")))
        self.setItem(5, 7, QTableWidgetItem(str("Approved")))
        self.setItem(6, 7, QTableWidgetItem(str("On Hold")))
        self.setItem(7, 7, QTableWidgetItem(str("Retake")))
        """cb = QComboBox(self)
        self.setCellWidget(1, 1, cb)"""
        self.setItem(0, 0, QTableWidgetItem(str("Retake")))
        rows = range(8)
        for row in rows:
            if self.horizontalHeaderItem(7).text() == "Status":
                if self.item(row, 7).text() == 'Sent for Still':
                    self.item(row, 7).setBackground(QColor(180, 220, 255))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'Ready to Check':
                    self.item(row, 7).setBackground(QColor(85, 255, 200))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'To Start':
                    self.item(row, 7).setBackground(QColor(255, 211, 135))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'WIP':
                    self.item(row, 7).setBackground(QColor(205, 200, 85))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'Revise':
                    self.item(row, 7).setBackground(QColor(205, 15, 5))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'Approved':
                    self.item(row, 7).setBackground(QColor(255, 130, 220))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'On Hold':
                    self.item(row, 7).setBackground(QColor(5, 15, 205))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'Retake':
                    self.item(row, 7).setBackground(QColor(110, 25, 20))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'Sent to Farm':
                    self.item(row, 7).setBackground(QColor(85, 200, 255))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                if self.item(row, 7).text() == 'Ready for Comp':
                    self.item(row, 7).setBackground(QColor(0, 0, 0))
                    self.item(row, 7).setTextColor(QColor(0, 0, 0))
                self.item(row, 7).setTextAlignment(Qt.AlignCenter)


class PaletteWidget(QWidget):
    t = (QPalette.Window, QPalette.WindowText, QPalette.Base,
         QPalette.AlternateBase, QPalette.ToolTipBase, QPalette.ToolTipText,
         QPalette.Text, QPalette.Button, QPalette.ButtonText, QPalette.BrightText,
         QPalette.Light, QPalette.Midlight, QPalette.Dark, QPalette.Mid, QPalette.Shadow,
         QPalette.Highlight, QPalette.HighlightedText, QPalette.Link, QPalette.LinkVisited)

    names = ("Window", "WindowText", "Base", "AlternateBase", "ToolTipBase", "ToolTipText",
             "Text", "Button", "ButtonText", "BrightText", "Light", "Midlight", "Dark", "Mid",
             "Shadow", "Highlight", "HighlightedText", "Link", "LinkVisited")

    def __init__(self, parent=None):
        QWidget.__init__(self, parent)
        self.setLayout(QFormLayout())
        self.labels = []
        for name in self.names:
            label = QLabel(self)
            self.labels.append(label)
            self.layout().addRow(name, label)

    def setmPalette(self, p):
        print("click")
        for i, lb in enumerate(self.labels):
            pal = QPalette()
            pal.setColor(QPalette.Window, p.color(self.t[i]))
            lb.setAutoFillBackground(True)
            lb.setPalette(pal)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dialog = MyDatabase()
    dialog.show()
    sys.exit(app.exec_())