Being legally blind in left eye, now right eye is blurry. My Windows 7 scrollbars' grays "blend together" and are difficult to see.
How can I either change to two colors or to two contrasting grays?
Windows includes high contrast themes for people with vision troubles...
In Windows 7 you can toggle High Contrast mode with Left Shift+Left Alt+Print Screen.
You can select and permanently enable a high contrast theme as well. Just right-click a blank area of the Desktop and choose "Personalize". Scroll down a bit and there should be a few different "Basic and High Contrast Themes" to choose from.