I don't know much about shaders so I am wondering if I am missing something completely obvious here. I am using the shader graph in Unity 2019. I am trying to create a starry look for my background, and everything was working fine. I could change the colour from the scripting API. Eventually I tried changing the colour to blue, and everything went black. I was super confused why this one colour wouldn't work. Eventually I went back into the shader and found that it only displays when certain colours are picked and I have NO idea why (see below).
I was hoping someone might know why this is happening.