Sweden. Thought it isn't light blue but blue, thou some flags are using a lighter colour...
Sources:
1. Me being Swedish
2. http://www.photius.com/flags/alphabetic_list.html
3. http://en.wikipedia.org/wiki/Flag_of_Sweden
4. http://en.wikipedia.org/wiki/List_of_flags_of_Sweden
Sweden
The Swedish flag is blue, with a yellow cross on it.
the colours of the swedish flag is blue and yellow
Sweden. It is a blue flag with a yellow cross.
The flag of Sweden is a Gold cross with the vertical bar off centre (a Scandinavian Cross) on a blue background.
the flag is blue and yellow. the christian cross is in yellow .
A yellow cross on a blue background.
pallou Palau has a blue flag with a yellow circle.
Sweden
The flag you may be referring to is that of Argentina, which features a light blue and white alternating stripe pattern with a golden sun with the face at its center.
Yellow, with a dark blue background :)
That's the flag of Barbados .
Romania