some color names are not matched to color codes by one to one.

The color name "violet" as an example,
some say the code of it "#8F00FF".
some say the code of it "#7F00FF".
some say the code of it "#8601AF".
some say the code of it "#EE82EE".

What is the correct code of the color name "violet"?

The color code of RGG seems to be defferent from the HTML color code.
The color code of color wheel seems to be defferent from the RBG color code.


For web publishing what color code should I always use?