Can not see Pycharm Monokai highlight color

Question

I like the Monokai theme that Pycharm 2017.3 comes with, but I can't see what I'm highlighting.

E.g.:

Nothing highlighted:

Highlighted the word delete_table:

Question: How do I change the highlight color in PyCharm?

Answer 1

Found it!

In Settings (Ctrl+Alt+S) > Editor > Color Scheme > General,

under Editor > Selection background:

Increased color brighness to 60, now I can see!