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From Wikipedia

The piece embodies fashions modern direction: clothing that accommodates the fluidity of lifestyle rather than adhering to rigid categories

For a boho bride, try looking for a gown that has added graphic lace or a plunging neckline

Fashion Design: The casual maxi dress for women designed with flutter short sleeves, round neck, simple solid color, elastic waist, side pockets, back key-hole closure, smocked tiered details

Eindrucksvoll die Karriere von Marlene Dietrich als Schauspielerin und Sngerin, berraschend ihr Liebesleben, das mit damaligen Konventionen brach, mutig und bewunderungswrdig die konsequente Ablehnung des Hitler-Regimes, tragisch der Rckzug aus dem Showbusiness und die selbst gewhlte Isolation in den letzten Jahren ihres langen Lebens

If the couple has a very specific palette and wants close family in neutrals, blue might stand out more than they want