Color makes sense! Color of the picture (if it is not a monochrome black&white) is one of the main characteristics our eyes pay attention at. In order to get harmonious pictures, you should know color palette of the location. This will help you to choose right color and texture of the clothes. In my practice I always check location before the session to make a color palette for the client. You can find examples of the locations spread out on the color gamma below. You can see how gamma differs.
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As a professional photographer, even if I know the location in detail, I always come there at least the day before the session to doublecheck. The hotel’s decorations may change, tulips blossom may end, the tree you like may be hacked away or the park you were looking for photoshoot is under reconstruction. It is better to be prepared for all this beforehand.