Another here who was really taken with the bun! Love it. Great outfit.

This is a gorgeous outfit, an elevated to skyscraping casual! Each thing fits in-and fits you, and coloring! Being also an ash blonde I love a medium taupe (like your tee here) which suits me-but along the years was very hard to find and I had to implement to my office wear (as I mainly dress for work)-and my not so pristine neck of woods which so blended together in one was harder than you'd think. 15yrs ago I had a taupe 3 pieces, midi skirt+straight pants designer suit from Taifun by Gerry Webber which was a very special, fabric- never met before and neither ever again.
It was sort of linen with invisible metallic fibres in the wave not only for an added subtle surface metallic shine, but for added crisp on holding some subtle vertical wrinkles in the fabric (was not supposed to be ironed!). Remember the waist of my short tailored jacket could be tucked even more closer to my body and out on hips and the lapels could hold their shape any possible arangement...that was a trouly fab suit-but too dressy all in one. Instead wore the jacket to the ground with other things.