<p>Natural light has a huge impact on colours in general, but especially on bathroom paint colours&nbsp;given how small the room is as compared to other rooms in the house like the bedroom or living room.</p><p>In the bathroom, dark toilet colours seem even darker if the windows are small or there is no source of direct sunlight, which is the case in most apartments today. That means you need bathroom wall ideas that factor in the lack of natural light and focus on the shade of artificial lights you will be installing. That usually means interior decorators end up recommending small bathroom designs&nbsp;which isn't so bad as they would be the most logical answer.&nbsp;</p><p>In case you want something more, you can add little colourful touches like placing a potted plant on a mantle or adding colourful knick-knacks or functional pieces like a bright-coloured handwash bottle.</p>