Colour with transparency

[kezz]

With the new text display entities comes an obvious good use case to stick components everywhere to make stuff pretty. However, I can't use adventure in the entire creation of a display entity because we do not have a colour object/interface/etc. that has transparency.

[zml2008]

We specifically filter out alpha on TextColor -- otherwise you can get components with differing colours that are visually identical. I think RGBLike would mostly fulfill the role of "interface allowing colour with alpha". Would it be sufficient to do a pass over the API to make sure RGBLike is accepted in more places?