There was an initial vote done through Discord to decide on new colors to help sorting trophies in inventory.
We know not everyone uses Discord, so wanted to also give opportunity to those who don't, have a chance to weigh in their vote.
The top row in this image shows how trophies are currently colored, by tier (Tier 1 to Tier 6)
A and B is the top 2 choices for new colors. Please choose your favorite choice on new colors for trophies/junk loot.
Some background on the reasoning of "B" that was discussed on Discord. Most MMO's follow a traditional color scheme of Common to Rare. White, Green, Blue, Yellow, Orange, Purple. B represents that scheme. While "A" was more brilliant colors to make sorting easier.
Either way, currently the top 4 tiers are easily confused.