A decoding method is disclosed that comprises: —decoding at least one luma component and two chroma components from a bitstream; —decoding color metadata, said metadata comprising at least one of: a syntax element representative of a color conversion type, a syntax element representative of an inverse transfer type and a syntax element representative of a color conversion matrix; —color converting the luma and/or chroma components responsive to said syntax element representative of a color conversion type; —applying an inverse transfer operation on the color converted luma and/or chroma to obtain a first, a second and a third component responsive to syntax element representative of an inverse transfer type; and —applying a color conversion matrix responsive to said syntax element representative of a color conversion matrix to obtain and RGB high dynamic range picture.