HsColour: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/HsColour - from package: hscolour

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/HsColour - from package: hscolour

You may install the required package with command apt-get install {package}

Error in other languages:
HsColour: bevel nie gevind nie
HsColour: comandă negăsită
HsColour: comando não encontrado
HsColour: commande introuvable
HsColour: command not found
HsColour: käsku ei ole
HsColour: không tìm thấy lệnh
HsColour: komanda nerasta
HsColour: Kommando nicht gefunden.
HsColour: kommandot finns inte
HsColour: komut yok
HsColour: nie znaleziono polecenia
HsColour: níor aimsíodh an t-ordú
HsColour: no se encontró la orden
HsColour: no s'ha trobat l'ordre
HsColour: opdracht niet gevonden
HsColour: parancs nem található
HsColour: perintah tidak ditemukan
HsColour: príkaz nenájdený
HsColour: příkaz nenalezen
HsColour: команда не найдена
HsColour: командата не е открита
HsColour: 命令找不到
HsColour: コマンドが見つかりません