Help Pink Back key and Menu key

[Renatia]

Hello,

I have my Samsung Galaxy Ace for three days. From yesterday I have feeling (I saw the transformation) that these two buttons turn from white to very light pink colour. In some YT previews I see these keys in white and in others in pink. Is this only my feeling or it can really be like that? I can find anything about that in manual. Please answer me and sorry for my bad english.

Thank you.

 

[sbnaul]

Its neither white nor pale pink but has a default led type color...