Right. Clutter. Receipts I should probably throw out. Spare mouse. Wallet. Seeds to plant one day. If this is a representation of my mind, it's not looking good.

The photo below is my suggestion for colour of floor. Furniture should be darker - similar to below. For the rug - choose one colour from the artwork and find a similar coloured rug. Don't put a mantle over the fireplace - it could be a health hazard - bumps and bruises. Blinds - unless you want them to make a statement I think white - to match window frames would be fine.

https://www.google.com.au/search?q=Wooden+box+with+glass+lid&client=safari&hl=en&prmd=isvn&tbm=isch&tbo=u&source=univ&fir=aCEjzva5ZlvaDM%253A%252C3zGzxUQtc19ahM%252C_%253BpJDVB_Z9g50FdM%253A%252C3zGzxUQtc19ahM%252C_%253BIx2SQ2MHFkjFEM%253A%252CJGtJcgzAykKqmM%252C_%253B770NbWQdtx4w0M%253A%252CJGtJcgzAykKqmM%252C_%253BZT_OkS8Gp6MiCM%253A%252CS8IXV7uVSpWslM%252C_%253BJXNcX4n-VuinOM%253A%252ChFAQhPQ7ogTD6M%252C_%253BLX6vQv6kmTXkrM%253A%252CIMQ5qzxZuQWdMM%252C_%253B5QExJmd_ujUIbM%253A%252Cl9SMm0rHJnt28M%252C_%253BJqmDfDxlJVC94M%253A%252CxazRz_ETQqOm0M%252C_%253BWHH-F0Yb-IEZ_M%253A%252CCBYX09qSPdH5hM%252C_&usg=__oUwUsn0yC7MXRrs6uVNYdseKKX4%3D&sa=X&ved=0ahUKEwjm-syHn8DMAhWGkKYKHddkCK0QsAQIGQ&biw=1024&bih=672

timber for warmth, that's a wild guess without seeing any photos, but just about any colour depending on your style