"crimson" as an X11 color is missing from the default color palette

[notaduck448]

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Describe the bug
The color "crimson" is missing from the default color palette. It's a color named on the X11 color list, but is not actually included in this library.

Environment and Version

• OS (incl. terminal and shell used): Windows Terminal (Powershell)
• Python Version: 3.8.3
• colorful Version: 0.5.4

To Reproduce

import colorful as cf
print(cf.crimson("test"))

Expected behavior
The text to be printed to the terminal in the appropriate color.