Sorry Viviana, Great minds and all that!
That's a great point about having one colour palette, and you can always add the odd splash of colour if you fancy a change. I have a stupidly large amount of grey and black dresses, but I have a trusty bright green cardigan, a detailed waist belt and lots of bright necklaces to make them look a bit different.
Also, one thing every girl needs: Gorgeous black patent heels. H&M and Zara do great ones that are comfy and classy rather than tacky!