QML Label dispays images with a blue-ish tint

That would suggest it is as @tomin suggests, a color order issue.
And i tried with @Edz sample as input, this “fixes” the image:
convert 936e1ea54107edee8763dbc69650c6e7c9350904.jpeg -separate +channel -swap 0,2 -combine -colorspace sRGB out.png