What is the blue and red color value of the blue and red background photos of the documents?

What is the blue background value of the photo with blue background?

As a document background does not necessarily have to be determined by numerical, but in general, color photos have two modes, RGB and CMYK.

If it's blue: r:0 g:191 b:243 or c:67% m:2% y:0% k:0%.

If you use red, the value can be set to: r:255 g:0 b:0 or c:0 m:99 y:100 k:0.

As a background as long as you feel comfortable on the line, so the value is not important, and as a good photo, clothing color and background matching is also very important oh.