glow_color_override use 0 to represent the team color, which is a valid value for black

Where is this used?

@unknown  it is used by new display entity family.

it is a rgb-color, to override its normal teamcolor.

for example, if it is 255, it is pure blue.

Can the override be used for other colors or just from black to blue (0 - 255)?

REDx256x256+GREENx256+BLUE=COLOR

to anyone who wants to use pure black, you can use 16777216 (256x256x256) instead.

it is not 0, but every useful bit are 0.

Probably due to negligence, this is incorrectly marked as WAI. This is FIXED in 23w07a and should be marked as fixed. Please change to "fixed"