mernen wrote:Do you have any ideas?
It has something to do with your color management mode.
You use the Value 1 and the default Value is 2
more about it: http://kb.mozillazine.org/Gfx.color_management.enabled
Please change it back. You have with this setting as well many other wrong colors and it is nearly impossible to build a theme for this setting.
type therefore about:config into the address bar
then gfx.color_management.mode into the Filter bar and use there Reset