Triadic schemes are made up of hues equally spaced around the 12-spoke color wheel. This is one of the more diverse color schemes.

Split complementary schemes are almost as easy as the complementary scheme. In this scheme, instead of using colors that are opposites, you use colors on either side of the hue opposite your base hue

Complementary schemes are created by combining colors from opposite sides of the color wheel. In their most basic form, these schemes consist of only two colors, but can easily be expanded using tones, tints, and shades. A word of warning, though: using colors that are exact opposites with the same chroma and/or value right next to each other can be very jarring visually (they’ll appear to actually vibrate along their border in the most severe uses). This is best avoided (either by leaving white space between them or by adding another, transitional color between them).
Analogous color schemes are the next easiest to create. Analogous schemes are created by using three colors that are next to each other on the 12-spoke color wheel. Generally, analogous color schemes all have the same chroma level, but by using tones, shades and tints we can add interest to these schemes and adapt them to our needs for designing websites.

Monochromatic color schemes are made up of different tones, shades and tints within a specific hue. These are the simplest color schemes to create, as they’re all taken from the same hue, making it harder to create a jarring or ugly scheme (though both are still possible).

color terminology: hue (what color something is, like blue or red); chroma (how pure a color is, the lack of white, black or gray added to it); saturation (the strength or weakness of a color); value (how light or dark a color is); tone (created by adding gray to a pure hue); shade (created by adding black to a pure hue); and tint (created by adding white to a hue).