XCode , can i search all views in xib files with a specific hex color?

问题

I'm working on an Ios app and i need to replace all the backgrounds color of my xib view from one code color to another, something like "replace #000000 with #666666". Can i do this search with Xcode? I think that is impossible but maybe there's a way...

EDIT

This is what i can find in a xib opened as source code:

<color key="backgroundColor" red="0.1764705882" green="0.1529411765" blue="0.1333333333" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>

But i can't search colors anyway

来源：https://stackoverflow.com/questions/34412555/xcode-can-i-search-all-views-in-xib-files-with-a-specific-hex-color