Henle App - design

yesterday I read about the quite interesting Henle App, from the renowned music publishing house Henle.
Besides a lot of features, there is one, which is especially interesting, the ability to display different fingerings by various artists.
You may read about it here: http://www.henle.de/blog/en/2017/02/13/the-henle-library-app-is-one-year-old-%e2%80%93-that%e2%80%99s-a-whole-year-of-digital-urtext/

One thing I noticed: in some areas the App uses the same colour/design pattern as Dorico does, dark grey and blue. Have a look here, the similarity is striking: