I want to make a png image glow by changing color by only changing the color of the colored pixels in the image. How do I do something like this? (Example: make a png of a sphere glow yellowish and whitish but only on the sphere and not the entire square image).
![Twitter](/assets/twitter-4e19209ef84344ee0c433f4c7bad8d49.png)
![Twitter.hover](/assets/twitter.hover-1fb19a5bafc50deace8f88eaec867845.png)