An Adobe expert is someone that has passed a test or a series of tests on how to use Adobe software. You can test on individual programs and get certified. You can also test on a series of software programs and get different levels of certification. You pay a fee and have to pass with at least a 61 percent.
A range of colors is commonly referred to as a color gamut. A color gamut of a device is the range of colors that the device can reproduce. A gamut is produced by combining the complete range of color combinations for any device or printing press.