Is there an addon that checks if you have white/green/blue/purple/yellow glyphs on an item and writes the Enchantment-Note of the item-tooltip in that color?
Not existing so far afaik.
I'm not sure if we're able to check if an item is enchanted with white/green/blue/purple or legendary runes.
If not
One would need to build a database with the + values for each level and check the item's trait too (increased enchanting value by x % needs to be calculated then too and it maybe have difficulties with rounding then).
Offhand, I have a filthy method for this that could work:
Take the item link and grab the enchantment quality value.
Create a new item link with the enchantment quality value as the item's quality value.
Run that through quality = GetItemLinkQuality(itemLink)
Run that link through GetItemQualityColor(quality)
You now have the color without bothering with a lookup table.
if you find a way without the database fine - if not let me know, i try to get all the values u will need...
because i dont like crafting enchantments i didn't really have to craft - especially the legendary ones...