Analogous colors on the color wheel are right next to each other and/or have a color in common. Like blue, blue/green, and blue/purple all contain blue. Red, orange and yellow are analogous because red and yellow make orange.
Cool colors are made mostly of green, blue and purple .
Warm colors are made mostly of red, orange and yellow.
Earth colors are not seen on most color wheels. Black, grays, whites, browns, beiges and tans are Earth colors and can be made by mixing all three primaries together with some black or white.