Different Colours can convey different meanings or connotations to the viewer.
Different magazines, especially special interest magazines will have specific colours for the specific audiences.
If i was designing a magazine for sports, the background i would use would be red, this is because study show that when people see the colour red it increases Physical Energy, something extremely important needed in sport.
For a gaming magazine i may use a yellow colour, as it increases fun, and humour, something you always need to have, especially when your gaming, and it shouldn't be different while reading a gaming magazine.
For a magazine specifically focused on ponies, i would just the colours of Blue and Indigo, this is because it increases a feel of calmness, peace and love, a nice feel of serenity as you read about nice, flourishing ponies.