kule - color; to paint, to color    

jelo - yellow
laso - blue
loje - red

walo - white
pimeja - black, dark

sitelen - picture, image; to draw, to write

Color combinations

Notice how there are no words like purple, green, or grey.So you see that blue and red combine to make the color purple.
   len -- clothing
   len laso -- blue clothing
   len laso loje -- reddish blue clothing; thus, purple clothing!

A list of common colors
   laso loje -- purple (reddish blue)
   laso jelo -- green (yellowish blue)
   loje jelo -- orange (yellowish red)
   loje walo -- pink (whitish red)
   walo pimeja -- grey (dark white)

Colors can't follow any logical pattern, so you're free to mix them:
   laso loje -- reddish blue = purple
   loje laso -- bluish red = purple
   laso jelo -- yellowish blue = green
   jelo laso -- bluish yellow = green

Using colors with pi
If you have a shirt  made up of loje and laso.  you can't call it len loje laso, because that means purple shirt .

.So, we have to use en to separate the two colors, and then we have to use pi to show that even though there are two different colors.

The us of kule

Using kule to ask what color something is

   ni li kule seme? -- What color is that? (That is color which?)

kule as a verb
kule as a verb just means to color or to paint
   mi kule e lipu -- I'm coloring the paper.

The use of sitelen.

As a noun it means picture or image.

As a verb, it means to draw or to write.

sitelen is most useful for the compound nouns that you can make with it.

sitelen tawa = motion picture -> is used to mean either a movie or a TV show

sitelen can also be used with ma to mean map

sitelen ma -> picture (of) land --> map
   

sitelen tawa The Simpsons li pona tawa mi. -- I like the TV show The Simpsons.
sitelen tawa The Godfather li pona kin. -- The movie The Godfather is good also.