Amazing question! Yup. Refractive index is a function of wavelength. I bet you already knew that on some level, because that's why prisms do their thing. As an extreme example, imagine X-rays: they barely refract at all, they just pass straight through stuff! Also, the change is actually quite smooth.

https://refractiveindex.info/

https://en.wikipedia.org/wiki/Dispersion_(optics)