Problem trying to alter the color of a texture (blendOverlay issue)

Hello, i’m trying to create an instance material to be able to change the color of the lanes of my roads. so, i’m using the traditional BlendOverlay node. the thing is, for some weird reason it doesn’t work properrly. it colors the grey part of the texture but the white lane isn’t colored properly, not to say at all. I’m pretty confused, as it’s the first time this happens to me