[Lazarus] Linux lazarus gtk2 look

[John Landmesser]

Is it possible to adjust the look of Lazarus _IDE (gtk2):

Same PC, Lazarus trunk but two different KDE linux Desktops.

This one is ok: Debian (Sid) KDE

https://drive.google.com/file/d/0BwR9__ABsiOFaXlLU0VOc2N2dzg/view?usp=sharing



That's bad: same PC but KDE on KaOS.

https://drive.google.com/file/d/0BwR9__ABsiOFeHpfcXhzTGR0dk0/view?usp=sharing

Where are these grey colors defined?