[ILLusion]

I understand, but you referenced taking the colour from a web site. If you're using your computer application to tell you what colour the web site is displaying, then you might as well be telling the web site to tell you what the RGB value is directly. The method you're proposing doesn't make any difference, nor does it make it colour correct.

Anybody with any Adobe product can pull RGB or CMYK values from any electronic colour swatch. The concern is whether that colour swatch is even accurate to begin with. A photograph of coyote brown in natural sunlight will look different from a photograph of coyote brown shot under tungsten lighting, which again is different from a photograph of coyote brown shot under fluorescent lighting.

Unless the photo has a white/black/grey card mixed in the photo, you won't get a proper white balance, and thus, you won't have a proper colour rendition.

Example: If a photograph is shot of someone under harsh fluorescent lighting, but the camera's white balance is set to incandescent, the image will have a very strong overcast of green/blue to it. You look at the picture of the person and you KNOW in your head that their skin is suppose to be flesh toned, but using your computer application to pick that colour from the skin won't give you the result of "flesh tone". It'll give you some value that is heavy in Cyan. It's not correct.

Which is why a physical Pantone selector is accurate. It's physical, and the swatch is placed beside the sample colour. Lighting environments are matched to ensure an accurate colour selection. It's done in person, validated and verified by you, and the authenticity of the source is not in question at all.