What does the stripes on the cards mean?

The software might show stripe of varios color on card to indicate:

White stripe – cards that are placed but they do not have a classroom assigned yet
My lessons are not placed in classrooms/Adding classrooms into created timetable

Red stripe - placed a card in a not allowed position
Time-off

Purple stripe - visual indications for cards that are over capacity
Max students for certain seminar lesson

Blue stripe - this subject has some pending students
Pending students view

Small stripe in the lower right corner - locked cards
Locked cards