gengo-to-ai:Colours (Colors) - 色（いろ） ____________________________________ Black: Kuro-i/ くろい/ 黒いBl
gengo-to-ai: Colours (Colors) - 色（いろ） ____________________________________ Black: Kuro-i/ くろい/ 黒いBlue: Ao-i/ あおい/ 青い Brown: Chairo/ ちゃいろ/ 茶色Green: Midori/ みどり/ 緑Orange: Daidaiiro/ だいだいいろ/ 橙色Pink: Momoiro/ ももいろ/ 桃色Purple: Murasaki/ むらさき/ 紫Red: Aka-i/ あかい/ 赤い White: Shiro-i/ しろい/ 白い Yellow: Kiiro-i/ きいろい/ 黄色い Note:When using colours as adjectives you will notice some end in ‘i’ and others don’t. In Japanese there are two ways which colours become adjectives ‘i’ and ‘no’. １)’い’Adjectives are used as follows：赤い車/Akai kuruma/Red car青い車/Aoi kuruma/ Blue car白い車/Shiroi kuruma / White car黒い車/Kuroi kuruma/ Black car(To form a noun, simply remove the 'i’. E.g. Akai, becomes Aka） 2)’の’Adjectives are used as follows:紫の傘/Murasaki no kasa / Purple umbrella.緑の傘/Midori no kasa / Green umbrella．Or add 'いろ’ onto the end of both 'midori’ and 'murasaki’ to form ____いろ の かさ.橙色の傘/Daidaiiro no kasa / Orange umbrella.桃色の傘/Momoiro no kasa / Pink umbrella. 3)The following can appear as either a 'い’ or 'の’ adjective.黄色（い/の）ペン/Kiiro-i/no pen / Yellow pen.茶色（い/の）ペン/Chairo-i/no pen / Brown pen. -- source link