Line 13 is white, but has a pattern of blue squares added.

Articles with a blue square are available only to subscribers.

River police had as their standard a blue square with a white "P" in the center.

Morgan's hand came up with the small blue square of plastic.

There is a blue square the same height as the white band.

In both cases, the blue square should be to the viewer's upper left.

Some level 1 enemies can also be hit, moving around in the small blue squares.

In the top left corner is a blue square with a white cross.

Stepping on the red or blue squares is not allowed.

The blue squares show what is allowed and green ones, potential changes in the near future.