Van Gogh traveled to Amsterdam by train[1] in early October 1885 where he spent much of his three days there at Rijksmuseum exploring the work of Frans Hals, Rembrandt and other known artists.
When he went to Paris, less than a year later, he started using brighter colors himself, like the painting Trees on a slope (in Dutch: Oever met bomen).
[1] While in Amsterdam his travel companion shopped at Van Gogh's Uncle Cor's business, but he did not enter the store,[2] likely due to strained relations after Van Gogh's experiences in The Hague.
Mauve and[4] his family did not approve of his domestic relationship with prostitute Sien Hoornik.
One even in the waiting room of the station, when I was too early for the train, the other in the morning, before I went to the museum at 10 o'clock.