Based on the theoretical analysis of the previous section, the alternative color spaces seem better choices for color masking tasks. This is especially true for the case of CIE-L*a*b* color space, which is particularly useful for such methods. The most important reason for this, is that CIE-L*a*b* isolates colors into its a* and b* channels in a way that is close to how humans perceive them. Therefore, in theory, we could rely on just one of the two color channels (depending on the color we want to isolate) for generating a color mask. The purer the color, the more probable it is to get the result we want. Let's revisit our previous color isolation example, using just channel a* for mask creation.