I'm not sure what you plan to do with these raw files in DCRaw, but here ya go. They are snapshots of my monitor screen taken with my 5D MarkII. The first two are wedges made in PS (ProphotoRGB, 16bit) and viewed from PS. The last one is a screen shot of Tim's wedge viewed directly at LULA and using the Chrome browser. I see color seepage in all three images. My monitor profile selected was made using the native WP, 2.2 gamma, and 120cd settings with the ColorMunki Photo puck and i1Studio software.
Step Wedge_Posterized_Viewed from PS
Step Wedge_Smooth_Viewed from PS
Tim_Wedge_Viewed from LULA and Chrome
As Tim noted, the image has a lot of moiré. The impact is uncertain due to possible non-linear CFA conversion algorithms. This is why I asked for the strip to be photographed at 20% to 40% of the camera frame as well as setting the small, F16, aperture.
There are other issues. When displaying it in Photoshop, use 100% zoom. Fractional zoom settings have less than perfect interpolation in Photoshop.
So, I'll be more specific in what is necessary to prevent aliasing (moiré). Resample the image of the continuous and step wedges in Photoshop so that the long side is 1200 pixels. Zoom the images to 100%. The strips should take up about half the monitor screen width. Then take a picture so that the monitor screen width about half fills the camera's image. This should produce a wedge that is about 25% of the full image horizontal size.
I only need the Photoshop images.
But given all that it really isn't bad. I converted the image to a linear RGB space and ran a heavy Gaussian blur (8 pix). There is not an unreasonable amount of color shift. It's within range of a typical monitor and video card LUT driven display neutral tone. Variation is within 1.5 dE and typically much less. Frankly, I'm surprised it's that close with the moiré. It's much less than the apparent color shifts in the video. Could be some sort of aliasing against the video recorder which may exaggerate shifts.
Sorry but I can't be more precise w/o a moiré free image.