I have the following image that is displayed in along similar images. Each image links to a tourism brochure. I've been tasked into adding a new brochure with its own image.

Each image features some drop shadow effect that I need to reproduce on the new image, but I do not know what drop shadow settings has been used to create the original drop shadow.

What steps are required to obtain the data needed to reproduce the drop shadow? I need to know the original color, radius and blur.
Is it possible or should I just try trial and error?


