COLORS: Colors that fit into the nautical theme are NAVY BLUE, RED, WHITE, and even colors like GREEN and YELLOW.
PATTERNS: the biggest thing with the nautical look is stripes. vertical stripes, horizontal stripes, also bold lines in general.
ETC:
Try blazers and jackets with gold buttons and embelishments.
Add anchor accesories in little bursts for a truly nautical feel.
You dont want to overdo this look because it is supposed to be fresh and breezy.
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Good Luck!
Love Lael