So, as it stands, there is a set number of named colors that are recognized by adventure, and are used by minimessage. One can "add" more colors by using a TagResolver, which should substitute a hex code when reading the tag name (1st image)

However, the problem shows when the new color isn't in a simple form, such as by using a gradient, where the name is simply not recognized (2nd image)

Could we maybe get a way to straight up add NamedTextColors? Maybe some way to register them in minimessage?