At first glance, the home of interior designer Carlotta Oddone is full of contradictions: an urban apartment with a rustic garden; a color-saturated space that has the effect of being deeply mellow; a floral laden interior that also feels contemporary.  But linger here and a sense of harmony emerges – the result of a quick and confident eye. ‘Yes, I am very sure in my decorative choices, even if not always in other areas of my life,’ says the Turin-born interior designer, whose 1930s home, one of the world’s best homes, occupies a busy street in the Piedmontese capital. ‘I’ve always liked to be unconventional.’  Carlotta has long had a…