枯淡[kotan] elegant simplicity
淡い[awai] light
淡黄色[tanoushoku] pale yellow
淡紅色[tankoushoku] pink
淡彩[tansai] light colouring

淡水[tansui] fresh water (i.e. not salt water)
淡雪[awayuki] light snowfall
濃淡[noutan] light and shade
濃淡画像[noutangazou] gray-scale image
平淡[heitan] simple

茜色[akaneiro] madder red
暗褐色[ankasshoku] dark brown
暗色[anshoku] dark colour
暗赤色[ansekishoku] dark red
異色[ishoku] singular (esp. artist, artwork)

からすの濡れ羽色[karasunonurebairo] glossy black (hair)
烏羽色[karasubairo] glossy black
炎色[enshoku] flame (color, colour)
鉛色[namariiro] lead colour
鴬色[uguisuiro] greenish brown