Opacity/alpha channel on text, how?

[w33zl]

When you define a color using RGB you could attach an alpha channel to add transparency. My question is how to achieve this on text when using the "|c" formatting option?

If I would set the color of an entire label to red I could do like this:

myLabel:SetColor(255, 0, 0) -- equivivalent of hex code FF0000

Or I could do like this:

myLabel:SetText("|cFF0000" .. myText .. "|r")

If I would like the red text to be semi-transparent I could do like this according to the method in the first example:

myLabel:SetColor(255, 0, 0, 0.5) -- equivivalent of hex code FF0000 with 50% transparency

But how do I achieve this using the "|c" method? I would like to do anything similar to:

myLabel:SetText("|cFF00007F" .. myText .. "|r")

Or:

myLabel:SetText("|cFF0000|7F" .. myText .. "|r")

But neither alternatives works. Could anyone shine some light on this issue?

BR,
w33zl