BANGKOK (Reuters) - Thailand officially ended a year of mourning for its late King Bhumibol Adulyadej on Monday, marking a return to colors for some after a monotone year during which many wore black from head-to-toe out of respect for their revered monarch. Hundreds of thousands of people thronged Bangkok’s historic quarter to bid farewell last week to King Bhumibol, who died in October 2016. His $90 million-dollar funeral, full of pomp and ancient ritual, took place over five days.