28 lines
774 B
Text
28 lines
774 B
Text
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#!/bin/sh
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##? ~/bin/hex2rgb - convert color hex to rgb
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# '#C0FFEE' => 192 255 238
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# 'DEADBEEF' => 222 173 190 239
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# 'fab' => 255 170 187
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# Shamelessly stolen from https://stackoverflow.com/questions/7253235/convert-hexadecimal-color-to-decimal-rgb-values-in-unix-shell-script/75643474#75643474
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__hex2rgb() {
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# reset $1 to scrubbed hex: '#01efa9' becomes '01EFA9'
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set -- "$(echo "$1" | tr -d '#' | tr '[:lower:]' '[:upper:]')"
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START=0
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STR=
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while (( START < ${#1} )); do
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# double each char under len 6 : FAB => FFAABB
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if (( ${#1} < 6 )); then
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STR="$(printf "${1:${START}:1}%.0s" 1 2)"
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(( START += 1 ))
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else
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STR="${1:${START}:2}"
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(( START += 2 ))
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fi
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echo "ibase=16; ${STR}" | bc
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done
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unset START STR
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}
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__hex2rgb "$@"
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