set_alpha: Set color's transparcy
In houyunhuang/tinycolor: Parse and Manipulate Colors with tinycolor.js

Description Usage Arguments Value Examples

Set the transparent of a color vector.

1	set_alpha(x, alpha = NA, na.rm = FALSE)

`x`	a any type color string or a javascript color object specifying.
`alpha`	transparency, number in [0, 1]; 0 means fully transparent, 1 means fully opaque.
`na.rm`	a logical value indicating whether NA values should be stripped before the computation proceeds.

Returns the modified color vector.

set_alpha("{ r: 1, g: 0, b: 0 }", alpha = 0.2)
set_alpha("{ h: 0.5, s: 0.5, v: 0.5 }", alpha = 0.5)
set_alpha("red", alpha = 0.6)
set_alpha("#F12", alpha = 0.7)