Although sRGB is not a perfect color space, it is characteristic of the majority of devices on which color is and will be viewed. Word 2000, Excel 2000, and PowerPoint 2000 use ICM 2.0 services. ICM 2.0 also works in conjunction with other color modifications, such as brightness, contrast, and grayscale. 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.
Because each device determines how its colors appear, RGB and CMYK are known as device-dependent color spaces. In addition, monitors, scanners, and printers have a specific range of colors that they can produce, known as the device gamut. This gamut is determined by the physical characteristics of the device itself, as well as by the ambient lighting. In other words, not only do devices produce different color ranges, but the bright lighting in your office may also alter how the colors look on your monitor. If you need more technical information, see Introduction to Color Management in Microsoft Windows Operating Systems and Colorspace Interchange Using sRGB .