浓墨重彩

nóng mò zhòng cǎi

thick and heavy in colors

to describe sth in colorful language with attention to detail (idiom)

浓

nóng

concentrated

墨

mò

abbr. for 墨西哥[Mo4 xi1 ge1], Mexico

重

zhòng

heavy

彩

cǎi

(bright) color