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
0.4.6

This version was deleted from PyPI around 2024-03-07. Installing fails with:
$ pip3 install yocolor==0.4.6 ERROR: Could not find a version that satisfies the requirement yocolor==0.4.6
View other deleted versions of yocolor

Install through StableBuild

You can install this package from StableBuild's PyPI snapshots from before the version was deleted:
pip3 install \ -i https://YOUR_API_KEY.pypimirror.stablebuild.com/2024-03-06/ \ yocolor==0.4.6
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Or, download files manually

And install manually via pip:
yocolor-0.4.6.tar.gz (22.5KB)