Certain colors of emissive material causing white outlines on objects

I have an emissive material on both my player and my platform. When my player is placed over the platform, the platform causes a white outline on the parts of the player that overlap the platform. The odd thing is that this only occurs with some colors. For example, this white outline is not there when I use a green emissive material or purple emissive material on the platform, but is present when I use a pink emissive material.

The only thing I have changed between these two materials is the color

thats because of the additive light model: