The phrase alludes to the frequent remark of azure-colored daytime skies paired with a selected sort of tailor-made jacket. The preliminary a part of the phrase describes a prevalent atmospheric situation, whereas the latter half identifies an article of clothes steadily related to skilled or semi-formal settings. As an example, one would possibly touch upon the climate being appropriate for sporting a blazer, given the clear, blue sky.
This expression’s relevance lies in its implied connection between environmental components and sartorial selections. The readability and brightness of the day can usually affect choices relating to apparel, notably in contexts the place look and appropriateness are concerns. Traditionally, sporting sure garments was dictated by climate situations and availability of sources.