Maybe you're in an apartment and the brown(ish) carpet and white(ish) walls must stay.
Maybe you're on a budget and the dark wood-like shelving works fine to hold your books, and you can't justify replacing it.
You've never invested much into your place. You have some hand me down dressers. A sofa from Target. You don't own art, really, except the ready-framed Klimt print you found at your neighbor's yard sale.