However, in order to achieve color fidelity or color management, the exact R, G, B color coordinates on chromaticity diagram must be agreed. Each pair of color coordinates specify a distinct or unique color. For example, (x, y) = (0.64, 0.30) is not equal to (x, y) = (0.63, 0.29), even though the numbers are very close to each other. In the display industry, there is also another piece of misleading information. Some panel manufactures or display brands marketing their monitors as “72% NTSC” in terms of color gamut to be “sRGB compatible”. Unfortunately, this is not the case. If we take the color coordinates from each color gamut from Table 1, and calculate the area of each color gamut. We can find out that the area ratio of sRGB to NTSC is 0.72 to 1. This is where the misleading concept of 72% NTSC equals to sRGB came from. The correct interpretation is “the number of colors that sRGB can reproduce is the same as 72% of NTSC, but the colors being reproduced are not necessarily the same colors.” Because the only constraint on 72% is the area ratio, and there is no information about the R, G, and B color coordinates. Hence, we could not say 72% NTSC color gamut is equal to sRGB color gamut. Therefore, it only makes sense when we talk about “coverage rate” when comparing two color gamuts. Example can be shown in Figure 3. On the left-hand side, both color gamuts have the same area ratio, but not 100% covered each other. On the right-hand side, only certain amount of monitor color gamut covers sRGB, and is not 100%. It is clear that this particular monitor cannot reproduce 100% of sRGB can, in terms of color.