Although sRGB is not a perfect color space, it is characteristic of the majority of video devices on which color is viewed. This brings us to the issue of printing. Word 2000, Excel 2000, and PowerPoint 2000 use ICM 2.0 services. Monitors, scanners, and printers produce color in different ways. These devices start with black and then add red, green, and blue to achieve colors.
Printers begin with white and subtract red, green, and blue to achieve colors and black.
Unfortunately the colour gamuts of RGB and CMYK produce colours which do not appear in the other gamut.