If I Save for Web in Illustrator, there is a very slight color change, which is to be expected. However, when I create a "Save for Web" action and apply it instead of directly using Save for Web, the color is much more vibrant.

I used the exact same settings as when I recorded the action- the only difference is that I'm using an action shortcut so that I don't have to jam my fingers with alt-cmd-shift-s every time. Why is it behaving this way?