With the group/component open, and the ‘In Model’ material browser also open, right click on the desired material in the browser > choose ‘Select’ to select all faces in the current drawing context with that color or texture.
With the group/component open, and the ‘In Model’ material browser also open, right click on the desired material in the browser > choose ‘Select’ to select all faces in the current drawing context with that color or texture.