Ive been flashing back and forth between Icy and Orange and noticed on some apps that sometimes the background and text font colors are similar and make it difficult to read due to the black background and dark grey text. I've noticed it on 3 apps, mostly news apps but not sure how many apps have the same issue. Its the same issue for the Orange and Icy themes.
EDIT: Attached a screenshot...for some reason the screenshot came out weird and is easier to read when I'm viewing it on my PC. But on the phone itself its extremely difficult.