no
rgb is three lanes rgba is four lanes rgb is not rgba
for some reason line breaks aren’t showing in posts, so my “other notes” appears as a run on sentence.
We’re accepting the bug report to review and update our documentation.
In Vuo 2.4.1 we clarified the section about opacity in the vuo.color node set documentation and added keywords so that additional nodes would show up when you search the node library for RGBA, HSLA, or CMYKA.