what does the shaded blue and red stats on your Pokémon's info page mean?
Oh, that's stats being affected by the Pokemon's nature.
Stats highlighted in red are raised by the nature, while stats highlighted in blue are lowered.
An example is a Timid nature Pokemon having raised Speed, lowered Attack. So that means they would have Speed highlighted in red, and Attack highlighted in blue.
Click here to see which stats each nature affects.