Colors

So I learnt about colors.
There are three types of colors. One primary, your standard original trio Red, Blue and Yellow.
Secondary are Green, Orange and Purple.
While tertiary ones are  yellow-orange, red-orange, red-purple, blue-purple, blue-green & yellow-green, the colors that make up their names are to be mixed to end up as them.

And they are all in a nifty color wheel for your reference, sweet.
There are also theories to create an amazing visual color usages. Such as:

Analogous colors. They are side by side in the color wheel and using them together is sweet.
And
Complementary colors are direct opposites of each other in the color wheel, but using them together is sweet.

So using colors correctly is sweet.