colours ... are associated with cheerfulness .. dolours is opposite
DOL(SOUNDS LIKE DULL)..and when are you DULL, when you are feeling SORRY for something.
dolorous-remember dolorous umbridge from harry potter ,she is so sad and sorrowful.
DULL ARE US
Link it with 'dollar'
DOLO(sway)+ROZ(evereday)....it's painful to sway like grass everyday without any reason....
The prices of DOLOR($) in Iran are dolorous.