According to Med-Health.net, one visible line on a pregnancy test means the test is negative and that the woman is not pregnant. Two visible lines mean the test is positive and the woman is pregnant.
Home pregnancy tests have some differences, but the number of lines for the results is standard. One line means the test is negative whether the line is blue, red or pink. The same goes for two lines: no matter what color your test lines are, two of them normally indicates pregnancy.
A popular misconception about pregnancy tests is that if the second line is faint it means the woman is not pregnant. Two lines, even if one is fainter than the other, still probably indicates a pregnancy. Confirmation from a doctor is always recommended.