Styling the Select element on the elementor form widget

[LilouDoudie]

Hi all! I really need our help on this one: I am working on a pop-up form using elementor form widget and I am having hard time styling it...

How do you guys style the select element? I am having a default bleu I would like to remove...

Here is the screenshot ... I have inspected the code with no success. Any hint? Thanks a lot for your help!!!