Just to jump in for all.
Warm white production in low cost diodes from Singapore and most all factories have been a mess for about 8 months.
Diode makers are taking the equipment and employee time to making more profitable products....
Why make something for $.50, when the same resources can make something for $1.00.
The demand for newer, brighter, etc, from auto and all other industries is causing this.
So factories either put less attention and effort into this, using lower paying entry employees,
or equipment, etc...
The answer from overseas is "pay 30% more".
The answer from the hobby, "no"
Working on it here...different factories, even some new production from Taiwan.
We currently pay extra to hand sort overseas, but its a humans eyes, working for pennies an hour,
and they tire.
So, there are shortages, changes, etc, on the supply side.
We certainly know, that everyone wants a perfect Kelvin, a 100% matched ideal warm white.
Threads like this help share this info.
Its important for me to share that I believe all LED vendors know, and are also working on it.
From the buyers side, understanding this is important too.
Many times the variance seen is not seen in a games actual after install, but indeed, 3 pops with
contained plastics should match. Sometimes, one needs variation, because the plastics in a game vary themselves or are repro.
The toughest thing that is hard is a customer that wants a tight Kelvin match, on all bulbs.
(in fact, if you send an email for a specific Kelvin, we run and hide under our desks in fear!)
We also have done extensive testing with pinheads, and warm white bulbs, and find that we
see this hue, all slightly different. We shoot for a light grey or light yellow hue, but powder today and final product can produce as Op has shared a tinge of green, pink, or darker yellow.
So, in conclusion, it may be best as one installs to watch the hue while installing.
Not freak out with scathing emails, and know sadly, this disparity...batch to batch....can be an issue.
(mostly in single LEDs, and the 4's which are low cost 3285 diodes).
Better consistency are 2 LED, (we carry exclusive), or 2 SMD Twin 2835, then a 1 SMD.
To avoid all this....try Sunlight!
or simply look at the final look upon install, noting the possible need to change a bulb to another. 
