#!/usr/bin/env bash set -euo pipefail script_dir="$(readlink -f "$(dirname "${0}")")" is_dark() { hexinput=$(echo "${1}" | tr '[:lower:]' '[:upper:]') half_darker=$("${script_dir}/darker.sh" "${hexinput}" 88) if [[ "${half_darker}" = "000000" ]] ; then return 0; else return 1; fi } is_dark "$@"