So I was able to get a bit of information in regards to your color question, Yuri. These aren't rules that are set in stone, but the current coloring system references back to our previous update to item names (Item names will be color-coded based on rarity.) as they're displayed in the UI.

As the Aeolian Scimitar is a crafted item, it follows the basic guideline where crafting-related items are typically displayed in white as they are usually more common. You'll find most green named items are used in instances of NM drops (or where materials from NM drops are used in their recipe).

But as I said, these aren't entirely set in stone, but hopefully it offers some insight into the reasoning behind the apparent randomness of colors on some items! Don't let its color detract from your enjoyment of it.