Issues wrt themes in yureka topic

Hi,

I got my yureka in 2nd sale and since then I am using it extensively ...My issue with themes is that few good themes preinstalled or whateevr we got from Shop Themes from phone ...few of them has black background and msg text color are also black....so I m unable to use it...like Hexo, Flis, Pury, Lumex etc...so is there any way to change font color...from black to white....

Also, asphalt 8 is getting crashed again and again...when review game popup comes after each race....either I select Review Now or Not now....its getting closed...any1 faced this...whats the fix if some1 knows?

Thanks in advance
Samit