What does one faint blue line and a dark mean on clear pregnancy test?

One faint blue line and a dark blue line on a pregnancy test typically indicates a positive result, meaning that human chorionic gonadotropin (hCG) hormone, which is produced during pregnancy, has been detected in the urine. The faint line may appear weaker because the concentration of hCG in the urine is still relatively low, especially in the early stages of pregnancy. The darker line indicates a higher concentration of hCG, which is more likely to be present in a further along pregnancy. However, it's important to note that interpretation of pregnancy test results can vary, so it's always best to refer to the instructions provided with the specific pregnancy test you've used or consult with a healthcare provider for confirmation and further guidance.