I just use the regular OPTIONS available with native SSMS. But then, it only color codes the bottom of the window and can be reset to default if something strange happens to SSMS.
When you have the login screen open click on options on the bottom. Then click on the second tab (connection properties). There is a checkbox at the bottom for "use custom color". Once you check the box there will be a select button on the right. Pick the color you want and off you go.
--EDIT--
Looks like Brandie posted the same while I was typing.
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