Dark tests

So i’m 4 Weeks pregnant today, i took my first 2 tests at 3 weeks 5 days which are the 2 top tests, and the bottom one is yesterday morning at 3 weeks 6 days, are these dark lines for how early i am, according to my app, im still not due on for 6 days, so i haven’t missed a period yet , (please ignore my nail, my acrylic got caught🤢🤣)