Dyed Elytras can't be dyed with oreDict (mod) dyes. Also, how about add a leather armor coloring-like sistem to the Elytra?

EDIT 1: Like AtomicWaffle14 said, you would dye elytra with white dyes, you also could un-dye it by clicking it in a water cauldron, you could also add dyed water and color your leather armor and elytra (like in Bedrock edition).

Another suggestion I'd like to add on to this is that the Dyed Elytras be more vibrant. They should more closely match the color of dyed wool. Right now the colors are very muddied and dark, probably due to some quick multiplication of the colors with the base gray color. This also makes the darker colors look way too dark. Here are some examples:

Pink:

Yellow:

Orange:

Green:

If these could be changed to look a lot more vibrant, I'd really appreciate it! Also, adding custom coloring akin to with leather dying would be a nice addition on top of this.

However, bone meal would have to dye it white instead of clearing the color. To clear off the color you'd have to use something else, like a water bucket maybe?