You're looking at the hard proof that a double breasted blazer and navy skinny jeans look amazing when paired together in a casual outfit. For something more on the smart end to finish off this outfit, add a pair of black loafers to this outfit.
Black Loafers with Double Breasted Blazer Warm Weather Outfits For Women
This pairing of a double breasted blazer and olive tapered pants is proof that a simple off-duty ensemble doesn't have to be boring. As for shoes, add a pair of black loafers to your look.