I'm trying to create an image that contains a set of logos. Each logo has different colors and I need to neutralize them. I tried converting the image colors to gray scale but it's not uniform, some grays and darker than others. The end results should be something like this:
How can I achieve this in Illustrator, preferably as a filter that I can toggle on/off?
All this logos have the same fill color (C:45, M:30, Y:25, K:0).
So, to convert the logos to grayscale:
Select all the shapes.
Edit > Edit colors > Recolor Artwork
Example (two at the same time):