Problem with QPixmap

[Nanouk]

Hello everyone, my name is Nanouk and I am trying to developp a game

for the lobby of the game I need to make a mask in a specific color on an image, I tried everything possible and came out with this :

QPixmap pix("images/radioButtonEmpty.png");
pix.createMaskFromColor(QColor(50,200,50),Qt::MaskInColor);
ui->label->setPixmap(pix);

but the specific color isn't transparent at all.

Also I have a problem with my pixmaps, the ones I define with the UI Form only show when I compile and execute in QT Creator and the ones I define as Code doesn't show. But when I go in the file and launch the .exe , it's the EXACT opposite, labels of the ui don't show and the ones define by code are displayed.

I would really like you guys to help me, since im new to this forum.

[Jeroentjehome]

Hi,
The colour may also be set with a alpha setting if I'm not mistaken.
The second problem is almost unanswerable. Without code we can only guess to where a mistake was made.
greetz