Alfred Grenander was a Swedish architect, furniture designer and city planner. Grenander first studied architecture at the Royal Institute of Technology (KTH) in Stockholm, Sweden, and then continued his studies in Charlottenburg, Germany. Grenander then stayed in Germany and continued his career in Berlin, where he was hired as an architect and city planner when Berlin’s city structure was being developed in the early 1900s. Grenander was chosen as the German representative in the St. Louis World Exhibition in 1904, where he was acclaimed as the "innovator of German construction art".
Grenander was hired as an architect in 1902 when the Berlin underground system U-bahn was going to be built. Grenander designed around seventy subway stations, which were all well received by the public due to his smart color choices, and also that he color coded the underground stations so they easily could be recognizable to the travellers. Color was important for Grenander and all his designs had strong, bold colors or pastels in various color combinations.