Custom QT Stylesheet Color Looks Bright & Fade

Hi,
I am trying to apply custom QT stylesheet (*.qss) in Natron and resultant color looks bright & fade.
is there any hidden setting ??
Reply

Thank you

Also not able to override QComboBox & QCheckBox style.

QComboBox is almost not used except at a few places. It was rewritten as ComboBox
The checkbox you’re looking for is probably ClickableLabel

see the source code