[FIX] set a default value for the documents color as proposed by Olivier Macchioni
[FIX] set a default value for the documents color as proposed by Olivier Macchioni

rschnapka/report-print-send,acsone/report-print-send,vrenaville/report-print-send,akretion/report-print-send,acsone/report-print-send,raycarnes/report-print-send,rschnapka/report-print-send,vrenaville/report-print-send,raycarnes/report-print-send,yvaucher/report-print-send