Style is not a question of clothes. It's about your whole personality.
As an example: her home. She wanted her garden-room to be a red garden in hell...
“Treasures, many Scotch snuffboxes in horn & silver, are massed on tables, walls, & shelves looking as if one could never get around to seeing them all. A long-stemmed anemone stands in a long-stemmed vase. There are oriental divans against the wall covered with inviting cushions, & she dines at a table pushed against a divan with bright cushions propped behind her back. She presides on a big Indian print-covered sofa like a sultan’s favourite, before & after dinner, with everyone gathered on small chairs at her feet. She lives in an atmosphere of informal luxury confined in crowded quarters, in an aura of intimacy & mystery.” (Bettina Ballard)
Her "Why don't you...?" column on Harper's Bazaar was a funny unusual credo for more glamour and individuality.
Why Don’t You… wear violet velvet mittens with everything?
Why Don’t You… paint a map of the world on all four walls of your boys’ nursery so they won’t grow up with a provincial point of view?
Don't just be your ordinary dull self. Why don't you be ingenious and make yourself into something else?