My dress code change occurred when we moved from having a physical office to go into each day to mostly working at home. I no longer felt I had restrictions on what I could wear but still had a desire to feel put together (even if I and the UPS man were the only ones who would see my outfit in a given day). This is partly how I came to YLF - looking for ideas for a casual but still "grown up" and put-together look in mostly warm and hot weather climate.
I also love navy and lots of other blues and berry too. High five on those great colors! I wear jeans a lot but also wear olive, tan and white pants or shorts. I don't mind wearing blue tops with jeans but it does depend on the color of the blues and how they go together. I'm not a denim on denim fan for myself (though I've seen others do it successfully). I have light weight very washable toppers in cotton slub, linen/cotton blends and similar. I wear heathered tan, white or navy toppers most often in summer. My olive toppers are just too heavy (though I think I'd like to add a linen/cotten blend jacket in a gray-olive if I can find one). Or maybe I'd add one in another color if it would work with most of my sleeveless tops. I really need to take inventory of the sleeveless tops I have and see which color topper would provide the most impact.
Thinking out loud about that (showing some examples from Finds, not all my exact items) - I have three sleeveless tops in navy (one with white details), one olive sleeveless top, a plum colored option, and a white option and one that is plum with multi-colored embroidered stripes and two that are patterned.
I always semi-tuck - which adds another consideration to which topper I'd choose.
Looking at my own finds, maybe another topper in white would be best - the one I have is very unstructured and thin and I'd prefer to have something just slightly more structured but not white denim - I have one of those and it's way too heavy for our climate.
ETA- I did order this inexpensive ON blazer to try. Haven't received it yet.