With it disabled, the itemname is displayed in white (this is vanilla behaviour), with it enabled it is not displayed at all.

Suggestion: Support displaying dyed item names generally (Items with dyed names have an NBT-tag with the relevant info)

Feature is no longer present in current versions.

Quark is changing the text colour in a really weird way. This requires a Quark specific workaround.

I'll look into it when I find the time to.