Since JLC's first appearance in "Asylum of the Daleks," I've noticed that the colour red has been a part of each version of the character. Whether there's anything deeper than just a cursory bit of continuity, I'm not sure, but it's kinda cool nonetheless.
sexy red dress, red sneakers, red stripes on socks
Clara Oswin Oswald:
first half of episode she wears a deep red dress
the most important leaf in the universe is red; she's wearing a red jacket when the Doc meets her as a kid; at her mum's funeral, she's wearing a red coat; when we first meet present day Clara, she's wearing a red/black top; she wears red leather gloves on the motorbike, her red satchel is a continuing accessory.
Is there something there or do I just have too much time on my hands? Maybe she just likes the colour red!