[R] What is the HEX code for "transparent" color?

[Gabor Grothendieck]

adjustcolor("#123456", alpha = 0.5) will return the indicated color
with an alpha transparency of 50% .

On Thu, Jun 6, 2024 at 11:07 AM Yosu Yurramendi
<yosu.yurramendi using gmail.com> wrote:
>
> What is the HEX code for "transparent" color?
> I've tried "00000000" "FFFFFF00" "FFFFFFFF", but they don't work.
> Thanks
>
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