A method for conforming color-graded video data to a fidelity range of a target display, wherein a pixel that is displayed accurately by the target display conforms to the fidelity range of the target display, the method comprising: identifying at least one pixel of the color-graded video data that is outside of the fidelity range of the target display; modifying the at least one identified pixel of the color-graded video data using a display model of the target display, such that the modified pixel is within the fidelity range of the target display, wherein the display model is configured to determine a substitute chromaticity and/or luminance with which the target display would display a pixel in the color-graded video data that is outside the fidelity range, wherein the display model is configured to determine a modified pixel value that represents the substitute chromaticity and/or luminance, and wherein modifying the at least one identified pixel comprises replacing an original pixel value of the at least one pixel with the modified pixel value given by the display model; modifying pixels of the color-graded video data that can be accurately displayed by the target display, by compressing a first space of colors that straddles a gamut boundary of the target display to fit into a second space of colors within a color gamut of the target display, and/or compressing a luminance range that straddles a luminance range limit of the target display to fit into a second luminance range within a luminance range of the target display; and rendering display video data comprising the modified pixels on a display having a fidelity range greater than the fidelity range of the target display. identifying at least one pixel of the color-graded video data that is outside of the fidelity range of the target display; modifying the at least one identified pixel of the color-graded video data using a display model of the target display, such that the modified pixel is within the fidelity range of the target display, wherein the display model is configured to determine a substitute chromaticity and/or luminance with which the target display would display a pixel in the color-graded video data that is outside the fidelity range, wherein the display model is configured to determine a modified pixel value that represents the substitute chromaticity and/or luminance, and wherein modifying the at least one identified pixel comprises replacing an original pixel value of the at least one pixel with the modified pixel value given by the display model; modifying pixels of the color-graded video data that can be accurately displayed by the target display, by compressing a first space of colors that straddles a gamut boundary of the target display to fit into a second space of colors within a color gamut of the target display, and/or compressing a luminance range that straddles a luminance range limit of the target display to fit into a second luminance range within a luminance range of the target display; and compressing a first space of colors that straddles a gamut boundary of the target display to fit into a second space of colors within a color gamut of the target display, and/or compressing a luminance range that straddles a luminance range limit of the target display to fit into a second luminance range within a luminance range of the target display; and rendering display video data comprising the modified pixels on a display having a fidelity range greater than the fidelity range of the target display.