Pokémon What's with the colored words?

[PaperLuigi3]

In XY, sometimes when I look at a Pokemon's stats, one or two of the words are colored. Sometimes they're pink, sometimes they're blue. What does it mean?

 

[Cam1]

Okay, so some naturea a pokemon may have change stats. The blue words are stats that are lowered by nature and the red words are heightened by nature.

 

[Hyoshido]

Using Adamant nature as a reference, the "Pink" or Red colored words mean that Physical Attack is increased and the Blue words meaning Special Attacks are decreased.

They're increased by 10% and decreased by 10% respectfully, so it's not a massive amount but it still helps, here's a reference for the increases and decreases in specific natures.
http://bulbapedia.bulbagarden.net/wiki/Nature

Take note to Hardy, Docile, Serious, Bashful and Quirky, they're natures that don't give any increased stats or any decreased stats so they're called "Neutral Natures"