Your computer monitor works within the sRGB (or comparable) color space, so it physically cannot render colors outside of that color space. When you look at tha

Your computer monitor works within the sRGB (or comparable) color space, so it physically cannot render colors outside of that color space. When you look at that diagram you're seeing a representation, not the real deal. Pigments could theoretically do a better job than pixels. But those would have to be some very good pigment$. I'm not sure if there is a printer that can produce this in practice. Your cheap inkjet printer definitely won't. The most expensive printers haven't been designed to cover the full human visual spectrum either, out of technical limitations, or cost limitations. And even when you have the pigments on print, the light $ource would have to contain the entire visible spectrum at high intensity (basically you'd need a very bright white light, as bright as the sun). And then the surface cannot have any glare. etc. So not very practical to achieve.