How to enable a colour filter that only affects certain game objects?

I'm making a rhythm game and to show the player is holding a long note, I'd like for it to change colour when it passes a certain position. Kind of like how a Sprite Mask works, but instead of making the note disappear it adds a purple (for example) colour filter on the notes. I've searched around but I haven't found anything, and tried lerping the colour but it changes the colour of the entire sprite at once, which isn't what I need. Any way of doing this?

Thank you!