Why is everything on screen lighter in color - more grayish.

Since loading Mavericks, all content on the screen seems to have become much lighter in color. The blacks have become dark gray and the grays are almost too bright to understand/read. Text on Numbers and Keynote are now so tough to read in thier current gray tone.
How can I make the colors darker. I am using a 2013 Mac Mini and two Planar 27" screens.
Thanks.

do your monitors have an option for brighteness and contrast internally?
to make changes through the os, go to spotlight (hit cmd+spacebar) and type in "colorsync utility" and then enter.
use this utility to create a profile and then choose the same profile for your other monitor.

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