Hey Taylor!
You’re gonna have to find out what you changed first, this could be a class or maybe even the font color for all body elements.
If you would like to revert a style change back to its original, you should alt + left mouse click the blue styling of the element you’ve changed (This will back it orange again).
In the example below I’ve overwritten the default color with black, but when i alt + left-clicked the styling it changed back to transparent; which apparently is the default color!