What is the rgb value for blue color of facebook?

Answer 1

Use inspect element to find out.
Right click, inspect element, then check style info.

Answer 2

If you are on windows, make a print screen, put in paint, choose color picker and click on the color, then Edit colors. It is red 66, green 103, blue 178, or in hex #4267B2

Answer 3

fyi. not sure if this applies but it is something that one should keep in mind.
Many companies copyright the colours they use. If you make a competing product with the same colours you open yourself to lawsuits.
😀 anyway..