I've seen a lot of people ask for this, so I'm finally delivering! This mod allows you to individually customize the colors (and texture) of all the vanilla enchantments.
You can also set the color used for any enchantments added by other mods, although all will get same color (in the future I hope to add the ability to allow that to be individually customized as well).
You also have a choice between the default texture and one that has "runes" in the enchanting font (which is technically the Standard Galactic font).
The color change should work everywhere there is enchantment glint, such as in your inventory, when they are entity items on the ground, and when you or others are equipped with them. (If you find somewhere they're not please file an issue.)