Full Hex Code Support

[varlevi]

Is your feature request related to a problem? Please describe.
Not a problem, just a feature.

Describe the solution you'd like
A way to not only get hex values as an output, but be able to input them as well.

Explain any problems that could arise
Entering values must be an easy process, and when adding multiple methods, we must be careful to maintain the ease of input.

Additional context
Check out this Stack Overflow page on RGB to Hex Conversions.