Quick oil sketches of the five different color schemes commonly used…

Monochromatic color scheme:

One dominant color(blue) with different values of the color by mixing it with black and white

Analogous Color Scheme:

you get this by using one dominant color could be anything but I used (orange) and the two colors next to it on the color wheel mine are red and yellow and using black and white again to get different values of these colors.

Complementary color scheme:

This one is done by using one dominant color (mine is Green) and the color opposite to it on the color wheel (red) then using black and white to make different values on these colors.

Triadic color scheme:

This is done by using colors that make a triangle on your color wheel (mine are red, blue, and yellow) then use black and white to get different values.

Split-complimentary color scheme:

This is done by using the two colors next to the opposite color on my color wheel (mine would be yellow, blue-violate, and red-violate.

Warm color schemes are better than cool they are more inviting to the viewer.