No matter what I do, it seems that for me, all the white lights omit a blue light color. I'm unsure if this is a glitch or if there is something else that is effecting the color of the lights, but I can't seem to find a work around.

It seems like in the process of placing them they are white, but once placed they turn to a light blue color.

A new release will be out soon to resolve this.

Fairy Lights 2.1.5 is now out to resolve this issue.

Same issue.
Minecraft version 1.12
Forge version 2768
Tested without any other mods installed besides forge
Also back-tested down to forge version 2765 (the lowest supported version for the latest mod version)
Tested again with forge version 2772
Issue persisted even with different forge versions
Tried downgrading Fairy Lights version all the way back to the latest 1.12 supported version, the issue still persisted.

Edit: It looks like the light gray color is surrounded by yellow instead of light gray as well. I think this might be a problem with the outer layer of the models not calling the right color when placed?