How to make emissive material which responds to Sprite Renderer color?

I am very new to unity, by the way, so I barely know anything about coding shaders/materials. I am trying to make only certain sprites in my project bloom using post processing, so I have to make an emissive material with a higher HDR threshold for those specific sprites/effects. The material is limited to only one color, so the sprites that I attach it to will only be that color which means that I would have to make a new material for every single effect/sprite and gradients in trail renderers won't work, because the color thing in the Sprite Renderer component doesn't have any effect. How would I make a material that has a higher HDR threshold and responds to the Sprite Renderer color thing, like the Sprites Default material. (2D)