I'm slightly biased because I'm allergic to too much colour (no, that is not a real medical condition), but coordination is important! Especially when it comes to decorating a space. Not to mention there's a power to be found in the cool, soothing simplicity in making the room look bigger using monochromatic paint colours and decor. These create a natural fluidity, which allows the space to feel cohesive.
Image Source: POPSUGAR Photography / Zareen Siddiqui