You can find color schemes online at www.colorschemer.com/online.html. You can find more options at www.webresourcesdepot.com/create-color-schemes-online/.
20, Word has 20 predefined color schemes.
The seven color schemes are monochromatic, analogous, complementary, split complementary, double complementary, triadic, and tone on tone.
If you enjoy experimenting with color schemes, http://colorschemedesigner.com/ is a terrific resource. The website displays complementary colors, color triads, mono-color schemes, tetrads.... It's fairly technical, but curiously easy to use. You can export your results, as well, so do not have to rely on your color memory.
A painting with similar color schemes and subject matter is referred to analogous
it has 20
there are many colors
Better Homes and Gardens has information about wedding color schemes. One could also discuss wedding color themes with a wedding planner if they chose to use one.
complementary colours
it has 20
This site has many different color schemes: http://kuler.adobe.com/#themes/rating?time=30 They also have many user creates schemes and a good rating system to determine which are most popular.
A collection of fonts and color schemes is called a design style guide. This guide helps maintain consistency and coherence in design projects by establishing guidelines for typography and color usage.