QoL: Item Rarity Colors

[Anapingofness]

Specifically for the Oil of Time and Sands of time, why are these items marked with the grey, "common" icons? Shouldn't they be at least green or blue icons?

Honestly, I ask that of myself quite frequently.
In addition to those items I'd like if other "rare" or "high level" items looked a bit different, namely, gold ore, coke, peacock ore, potash, etc, etc (the list goes on and on)
They're all "rare" or "high level" items that shouldn't ever be confused with normal items. =\ I wish SE would differentiate those items from normal items and from other "rare/high level" items.