setPen after drawRect and before drawText does not draw the text with the right color.

I wanna draw a rect with a given pen color and a text with the same pen color
Here is a piece of code I use do do this, in the paint method of my QGraphicsItem

 void myGraphicsItem::paint( QPainter *painter, const QStyleOptionGraphicsItem * /*option*/, QWidget * /*widget*/ )
{   
    int alpha = 60;

    QColor penColor(83,93,111,alpha);
    painter->setPen(penColor);
    painter->drawRect(myRect);
    
    painter->drawText(myTextPosition, QString( "My Text" ));
}

The text is drawn in strong black, with no transparency
Adding the following code before the drawTextprovides the same effect :
// Provide another pen with the same color
QColor penColor2(83,93,111,alpha);
painter->setPen(penColor2);

Finally providing a new pen with another color has the expected effet :
// Here, we change only the red component from 83 to 80 for example
QColor penColor2(80,93,111,alpha);
painter->setPen(penColor2);