Comment 8 for bug 574383

Hate to say it, but it's even worse since changing that color back to black is now harder than before when we had Gnome 2 and nice dialog for this.

Virtually ALL text on screen is gray, half of it on gray background as well, with web and mail being the only exceptions. It makes reading harder.
People sometimes use their laptops in sunny rooms, in direct sunlight, they may have poor eyesight, they would like to reduce screen brightness to save battery, etc. In all these mentioned cases having lower contrast is wrong.

Actually it doesn't affect exporting to PDF or printing from LibreOffice, text is converted to black. But there is one huge exception, equations still remain gray everywhere.