You're looking at StableBuild's Deleted PyPI mirror - where we index all deleted packages from the Python package registry.
yocolor was reported malicious
SNYK-PYTHON-YOCOLOR-6483332 - The yocolor package contains malware and attempts to compromise users by adopting dependency confusion techniques

yocolor

This package was deleted from PyPI around 2024-03-07. Installing fails with:
$ pip3 install yocolor ERROR: Could not find a version that satisfies the requirement yocolor (from versions: none) ERROR: No matching distribution found for yocolor

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pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-03-06/ \ yocolor
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0.4.6