termpal
(short for terminal palette) is a dead simple CLI tool that shows
you how colors will look in your terminal.
go:
go install github.com/dhth/termpal@latest
echo '#fb4934\n#83a598\n#d3869b' | termpal
# or
termpal -colors='#fb4934,#83a598,#d3869b'
# or
termpal -colors='#fb4934, #83a598, #d3869b'
# or
cat colors.txt | termpal -foreground='#3c3836'