Any way to adjust text brightness?

[cdf3]

I noticed that while reading web pages and reading through posts using the TapaTalk app, the background on my Nexus 7 is lighter than my other devices, as well as the text.
Reading text on my iPad, Razr Maxx, and Saumsung tablet, the background is a shade darker than on my Nexus 7, as well as the text. The text on the other devices is dark and rich, while text on my Nexus 7 is light and washed out.

Any one noticed this as well?

Sent from my iPad using Tapatalk HD