color blindness problem

Very very good point.  So simple to use a language, "installed" "updated" "available".   When there are acres of pixels available in a typical installation.

I went Go-Carting with friends for a stag do, and they asked if their was anyone with colour blindness, the stag confessed he did, with Green and Red. Just a bit of an issue with stop and go.
 
Maybe if they want to keep the icons for prettyfication reasons and description box could popo up when you hover over them, saying  "installed", "updated", and "available".
 

I am not completely color blind but I have color perception problem (for "normal" people, think about distinguishing colors in the dark environment). In most cases I have no problems, but in particular cases I have no way to see the difference. And CW CC is one of such exceptions (what is "upgradable" and what is "up to date").
 
Note that the fix is rather simple. Who does not see colors well is normally has better sense of lumi level. Make colors the way it is possible to  distinguish them after the color information is removed. Take a screen shot and convert it to grayscale based on lightness (but better test other methods as well) to see what I mean.