I don't know if someone already asked this but why the bar of skills becomes blue sometimes? I haven't figured what it means
If Daily Skill Caps are on (toggleable in Options), the bars will turn blue to indicate that you have reached the cap for that day.
I personally find the most enjoyment with them off, but that's entirely up to you. On is the default and the way the game is intended to be played.
Oh, i see, i didn't even know that was a thing. Thanks!