RGB function in HTML ? html is scripting language how can it have a function?

Question

I think markup languages don't have functions in them then what is rgb() ?

Answer 1

In HTML, rgb() has no special meaning. It is just text.

In CSS, rgb() is a syntax for describing colours and is not a function.

In JavaScript, rgb() is a call to a function called rgb. This is not a built in function and you have to define it yourself.