The creator of Miffy the Rabbit explained here (45m25) how Matisse inspired him. In an article in the Telegraph, 'I saw Matisse - and came up with Miffy', Dick Bruna said:
"[In Paris] I saw Picasso for the first time and Léger and all those big painters. When I saw Matisse's work – especially his late collages – he became the most important man in my life."Also here and here. Below is how Matisse inspired other modern graphic designers.