Hi heirflick, check the book again ,although the pics in the book are monochrome one rear 3/4s shot clearly shows lining and she is listed as having been painted in lined green as per the 800 class.However this was in CIE days ,prior to that in GSR days she'd be in grey. Whether she remained in green right till the end of her life I don't know,as by the last days of steam on CIE quite a few locos got plain black . Can't remember when she was withdrawn though. If she was withdrawn from service in the 50s she probably ended her days in the green.