Glowing Phantoms don't glow the right color if they're in a team that has an assigned color (such as blue, red, etc...). They will always glow white.

How I found this bug:

1. I made three repeating command blocks that made it so that every Phantoms, Husks and Strays are given the tag of "ENEMY" 
2. I created a team called ENEMYTEAM
3. Made a repeating command block that makes all mobs with the ENEMY tag will be added to the ENEMYTEAM
4. I made the color of ENEMYTEAM green
5. I made 1 Phantom, 1 Husk, and 1 Stray glow

The Stray and the Husk were glowing green as expected, but the Phantom was glowing WHITE.

I hope you don't mind me using a resource pack for this bug report. I'm sorry.

For this screenshot, the Phantoms remain with default textures, the Husk's textures are modified to look like brown "robots" and the Strays' textures are modified to look like silver "robots."