We’ve touched on this a bit before, but adding a bright accent color into an otherwise-neutral palette is one of the easiest color schemes to create. It’s also one of the most striking, visually. If you’re unsure of your skills in regard to creating custom schemes, try starting out with these types of palettes.
Here are a few examples to give you an idea of what I’m talking about:
You can see here how using browns instead of grays makes the entire scheme look warmer, even with the blue accent color.
You can use tones of any color instead of gray or brown in this type of scheme, just keep it very close to the gray end of the spectrum for the most fool-proof results. As a general rule, cool grays and pure grays are best for more modern designs. For traditional designs, warmer grays and browns often work better.