observations
-different colors
-can't really see the sky
-little kid working out on the field
-he's white
-it's sunny because he has shade

inferences
-all the different colors have different meaning
-if this was in the days of slavery, a white person is doing the work
-its very sunny and hes very tired
- the green might mean hope

I think that the artist, Van Gogh was trying to say don't give up that you'll get there. The color green can repersent hope. that you will get what you need or want if you just try hard enough. that life might be hard but its not going to change.