How to change default font text color of a theme?

Hi guys. Basically we're using Smartdark theme and the issue is it's really difficult for people to read the forum because the background color is dark grey, while the font text is pitch black.
is there anyway to resolve this by changing the default font color into another color everytime someone post? I think it's a serious design flaw, anyone have this same issue as well with smartdark?
For example look at this thread. http://elysiumguild.kilu.de/viewtopic.php?t=14
You'll have to highlight it in order to read it. And I don't think the users would be willing to manually change the font color of their post every single time.
If you know of a way to change it, please let me know. Would deeply appreciate it.
Thank you!
is there anyway to resolve this by changing the default font color into another color everytime someone post? I think it's a serious design flaw, anyone have this same issue as well with smartdark?
For example look at this thread. http://elysiumguild.kilu.de/viewtopic.php?t=14
You'll have to highlight it in order to read it. And I don't think the users would be willing to manually change the font color of their post every single time.
If you know of a way to change it, please let me know. Would deeply appreciate it.
Thank you!