How to change color of scroll bars and window borders?

I just upgraded to PyCharm 3.4 (on a new computer with Mavericks) from 3.1 (and Snow Leopard).

I've imported my settings from the old PyCharm installation and all looks and works the same – EXCEPT the panel scroll bars and boarders are (1) a much lighter shade of gray and (2) thicker.

How can I make them darker and thinner?

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