During the second week, I learned about colour correcting in Nuke. I discovered multiple nodes that can be used for adjusting colour.
First of all, I unpremulted the image of the jet. I applied a blur to the background image and used it to divide the image of the jet. In this way, I managed to apply colour from the background image onto the jet.
Additionally, I used grade node to adjust white and black point. I also used colour correct to adjust saturation, contrast and gamma.