Google seems to always be adding little, however useful improvements to Gmail. This time is not any different, what may seem like a small update is actually a very handy new feature. The newest feature is label colors, which will allow you to set a unique color for each label, which in turn will make it quicker and easier to judge which emails can wait and which must be read.
A nice feature to have especially for those who get more than their fair share of email. Similar to other Gmail updates, this is being rolled out over time, so as of this writing you may or may not be able to use your label colors just yet.
Read [Google Operating System]