A method of video decoding performed in a video decoder is disclosed. A first syntax element indicating whether a video is monochrome or includes color components that are encoded separately is generated. A second syntax element that indicates whether joint coding of chroma residuals is enabled based on whether the video is monochrome or includes color components that are encoded separately is generated. Further, a coded video bitstream that includes the first syntax element is generated. The coded video bitstream includes the second syntax element based on whether the video is monochrome or includes color components that are encoded separately. The first syntax element and the second syntax element are different syntax elements.