Bogen was a versatile artist. He created oil paintings, watercolours and gouaches, drawings, graphic art, sculptures, and murals. He designed theatre stages, and illustrated literature. Influenced by the school of Vilnius colourists, he spent his life searching for colours that would render his delight for the ever-reviving nature and humans in the most perfect way possible. His extraordinary sensitivity to colours allowed him to experience the interrelations between them and the world of sounds. He would assert this fascination on multiple occasions: “When I paint with watercolour, gouache or pastels, I can find a proper musical sound of colours and their wonderful clarity at the first stroke of my brush”31.
His art evolved from the realistic, expressionist representations of partisan combat and scenes from the liquidation of the ghetto through the synthesis of forms towards abstraction. Although his oeuvre predominantly includes cheerful landscapes, figural scenes and compositions built only with colours, referring mostly to Middle East landscapes, it also has motifs referring to the trauma of the Holocaust, at times as separate paintings, and on other occasions as elements aimed at disrupting the idyllic image of the world.