Here's a fun idea that gives a room a co-ordinated look instantly, and it's free!
Decide on an accent colour for your kitchen - let's say the curtains are green. Next time you come back with the shopping you leave out all the green things - so the green apples go in the bowl along with the green grapes. The green beans and cabbage sit out on a basket on the countertop with the green pepper. The red pepper and the other veg and fruit go in the fridge or in a cupboard. The green wahing up liquid stays out, and next time you buy washing up cloths you get green ones. Hang up the tea towels with green on them. Find a green hand towel and green soap. (You could dye a bundle of old towels and tea towels green.) Spare carrier bags all go into the green one which you hang on the doorhandle. A big bunch of branches from any green shrub or tree, a pot of basil or parsley, some green postcards/greetings cards/pictures from a magazine can be blu tacked to the wall.
Basically, if it's green leave it on show, if it's not green put it in a cupboard....et voila! Step back and admire.
It works in any room in the house. Easy on the eye - harmony and calm....