Curious about my milk supply

So I’m curious. This is my 3rd child, but my first fully breastfeeding/pumping time. My first two were not successful at breastfeeding completely. I’m barely 1 week PP but I can’t tell if this is still transitional milk or mature milk. They say mature milk is lighter and the one in the pic (currently pumping as I type) looks just like the picture shown for mature milk. I’m confused because it says transitional milk still has a bit of fat content and so does mine but the color confuses me. I’m supplementing because I really want my breastfeeding attempt to last at least 6 months. I pump every 2-3 hours and i barely get 3oz combined from both sides.