That is true that the guy talk about, some time the color you see is not the real color you think, you need a tool like color picker or Color Sampler Tool in adobe (ps, illustrator ,ect.) to get the correct CMYK OR RGB color information.
That is true that the guy talk about, some time the color you see is not the real color you think, you need a tool like color picker or Color Sampler Tool in adobe (ps, illustrator ,ect.) to get the correct CMYK OR RGB color information.