For some RGB values, the final QRgb value obtained by converting RGB to HSL and then back to RGB is not equal to the value before conversion

#include "mainwindow.h"
#include <QApplication>
#include <QColor>

int main(int argc, char *argv[])
{ 
    QApplication a(argc, argv); 
    QRgb preCol = qRgb(254, 2, 0); //pre is 4294836736

    qreal h, s, l;
    QColor rgbColor(preCol);
    rgbColor.getHslF(&h, &s, &l);
    QColor hslColor; hslColor.setHslF(h, s, l);
    QRgb afterCol = hslColor.rgb(); //rgb --> hsl --> rgb after is 4294836480 Bug is different from before rgb
}