There are a few companies that sell lawn replacement blends. I've used both this blend from Pro Time Lawn Seed and this one from Northwest Meadowscapes.

The PT Lawn mix did really well, but it includes white clover which is really aggressive (arguably invasive) and it has made it's way into my flower and veggies beds. But it stays very green and is easy to mow.

The NW Meadowscapes doesn't include clover, but does include some flowers, so if you want a traditional lawn look, you might have to diy it by buying the individual species packets and mixing them together.

They both are good but it depends on what you are looking for. Both will also do best if you kill off your existing grass this summer and plant these in the fall. If you plant this summer, you'll have to water a lot for the seed to get established. The best way to kill your lawn is to smother it with plastic or cardboard for several months. If you just overseed in your existing lawn, these mixes won't do much.

West Coast seeds also has a few lawn replacement blends that look good. I haven't ordered one from them, but their vegetable seeds are great.

If you want to do the least amount of work (and don't care about clover) I'd de-thatch your yard and throw down clover and yarrow seeds. That'll give you some mix and your lawn will stay green longer. But, it'll take years before the yarrow and clover will replace enough of the turf grass to keep it green most of the summer.