I present you a wonderful theme: Vintage. As the name suggests, while based on the MIUI theme, it proposes Sepia-like icons for a pleasing style back. The rainbow background adds a color note and balances the tones.
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[button-green position = "center" url = "http://adf.ly/3252002/tema-miui-vintage" target = "_ blank" position = "left"] Download Theme MIUI Vintage[/ Button-green]