He is best known for his concrete art of the 1920s and 1930s consisting of blue, red and yellow rectangular forms separated by thick black lines. (visual-arts-cork.com)
His iconic style is made of a clear, white background and thick black lines placed in an abstract way. (zoomoncontemporaryart.com)
Look at his eyes, how they are red and how they have a very thick black lining around them, more pronounced than you'd expect really. (mariopartylegacy.com)