For a surefire off-duty option, you can always rely on this pairing of a navy plaid blazer and navy jeans.
Navy Plaid Blazer with Navy Jeans Smart Casual Warm Weather Outfits For Women
For an off-duty getup, go for a navy plaid blazer and navy jeans — these two items go well together. Get a little creative when it comes to shoes and tone down this outfit by slipping into a pair of grey calf hair lace-up flat boots.