A video decoder decodes a first indication (190) indicating whether transform coefficients of a first transform coefficient block (921) corresponding to a first color component are encoded into a data stream. The decoder also decodes a second indication (190) indicating whether transform coefficients of a second transform coefficient block (922) corresponding to a second color component are encoded into the data stream using context-adaptive entropy decoding with a context selected based on the first indication for the first transform coefficient block (921). The decoder further derives a block (84) of the picture by, separately for the first color component and the second color component, a reverse transformation of the first transform coefficient block (921 and the second transform block (922, respectively.