In the 1930s the numbers were changed uniformly to four digits and the collection was renamed to "RAL 840 R" (R for revised). With tints constantly added to the collection, it was revised again in 1961 and changed to "RAL 840-HR", which consists of 210 colours and is in use to this day. In the 1960s the colours were given supplemental names to avoid confusion in case of transposed digits. At the international furnishing fair "imm Cologne", 13 till 19 January 2020, two new colours were presented in the Classic Collection: RAL 2017 RAL Orange and RAL 9012 Clean Room White.