Mostra cores

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#!/bin/bash
 #################################################################
 ##                                                             ##
 ##  CRIADO POR: Marcelo Oliver / marceloliver[At]gmail[Dot]com ##
 ##  QUANDO: Outubro/2015                                       ##
 ##  Agradeço a todos que compartilham os conhecimentos ...     ##
 ##                                                             ##
 #################################################################
COR1="\x1B[1;38;5;190m"
COR2="\x1B[1;38;5;196m"
FC="\x1B[m"
ESCOLHA() {    
    read -p " ESCOLHA A COR: " -e -n3
    if [[ $REPLY == +(XXX|xxx) ]];then
    echo -e "$COR1 ENCERRADO$FC\n"
    exit 0
    elif (($REPLY<1)) || (($REPLY>512));then echo -e "\n$COR2 OPÇãO INVáLIDA$FC\n" ; ESCOLHA
    else
    REPLY=$((10#$REPLY))
    COR=$((REPLY/2))
    ATB=$((REPLY%2))
    printf "$COR1 %03d => $FC" "$REPLY" ; echo "\x1B[$ATB;38;5;${COR}m" | tee -a COR_ESCOLHIDA.txt
    ESCOLHA
    fi
}
    clear
    COLS=$(tput cols)
    DIV=$((COLS/7))
    printf "\n  TABELA DE CORES:\n"
    echo;IND=1;for COR in {0..255};do for ATB in 0 1;do
    #SE INDICE É MULTIPLO DE "$DIV" => \n
    if [ $(($IND%DIV)) -eq 0 ];then
    printf "  %b&#9608;%03d&#9608;%b"  "\x1B[${ATB};38;05;${COR}m" "$((IND++))" "\x1B[m\n"
    else
    printf "  %b&#9608;%03d&#9608;%b"  "\x1B[${ATB};38;05;${COR}m" "$((IND++))" "\x1B[m"
    fi
    done;done
    echo -e "\n"
    ESCOLHA