Blue primary: Red=0%, Green=0%, Blue=100% (Hex #0000FF)

Blue |

Red primary: Red=100%, Green=0%, Blue=0% (Hex #FF0000)

Red |

Green primary: Red=0%, Green=100%, Blue=0% (Hex #00FF00)

Green |

Let's start mixing!

If we add equal parts of red and green, we get ...

Red |
Yellow |
Green |

In this case, yellow is Red=100%, Green=100%, and Blue=0% (Hex #FFFF00).

Let's add equal parts of red and blue:

Red |
Purple |
Blue |

The above purple is red=100%, green=0, and blue=100% (Hex #FF00FF).

This is the result if we add equal amounts of blue and green:

Green |
Aqua |
Blue |

The above combination is red=0, green=100%, and blue=100% (Hex #00FFFF)

What happens if we have equal amounts of all three primaries?

White |

This one is red=100%, green=100%, and blue=100% (Hex #FFFFFF). Combining equal amounts of all three primaries gives us white.

What would the absence of all three primaries look like?

Black |

Black is red=0%, green=0%, and blue=0% (Hex #000000). If we have none of the three primaries, we are left with nothing. This looks black because there is no light coming from it.

Colors on the web are generally expressed in hexidecimal. The first two digits of these codes represent red, the second pair represents green, and the last pair represents blue. 00 is an absence of a particular primary color, whereas FF is the maximal value for a particular primary. For example, #FF0000 is red, #00FF00 is green, and #0000FF is blue.