About colours: when a test has just been created, it is RED. You can then choose to edit it and tell us it is not finished (GRAY). If the test is not GRAY, a moderator will review it and he will change its colour.
YELLOW= this test has been reviewed, but there is a problem, which will be soon solved by moderators.
BLACK = a moderator is currently working on this test.
ORANGE = the test looks OK, but a final review is needed.
GREEN = this test will be published soon.
BLUE = congratulations, this test will be published in the newsletter soon.