Yo! I know about 4 languages:
English (native)
German (learned for 6 years)
French (learned for 7 years)
Japanese (learned for 2 years (by tutoring, not at school))
Here's some vocab for colours;
kuroi=black
akai=red
ki-iroi=yellow
shiroi=white
aoi=blue
cha-iroi=brown
(these are all adjectives, and become nouns without the final "i")
midori=green
hai-iro=grey
gin-iro=silver
murasaki=purple
pinku=pink
mizu-iro=light blue
kin-iro=gold
Hope that helps you!