This function computes the average color of the provided hex color values.

## Arguments

- ...
Hex color values as character strings. Could also be any number
of character vectors (including lists) which will all be coerced into one
character, assuming they are valid hex codes.

## Value

A single hex color character representing the average of the input
colors.

## Examples

```
getAvgHex("#000000", "#FF00FF")
#> [1] "#800080"
getAvgHex(c("#008040", "#000000", "#FF00FF"))
#> [1] "#552B6A"
# very nonstandard but possible way to input hexes. Essentially,
# any combination of vectors will work.
getAvgHex(list("#008040", "#000000"), "#FF00FF", c("#FF00FF"))
#> [1] "#80208F"
```