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3. RGB Number (Red Green Blue): 000 000 000

Red Green Blue is just a different system or code for the same colours. The numbers run from 0 through to 255. You cannot have a number bigger than 255 in RGB. Many people prefer to use the RGB easier than hexadecimal. RGB is split up into three parts: Red, Green and Blue.

For a RGB number to be web safe, each of these three numbers has to be divisible by 51. The only numbers you can use are: 000 or 051 or 102 or 153 or 204 or 255. For example:

204 051 255 is web safe

200 051 255 is not web safe.

In RGB if one of the numbers is less than one hundred, you do not need type the zero. 051 051 000 is the same colour as 51 51 0. This is a web safe colour.

The reason we use RGB as a colour system is because a screen has three lights in it. Yes that is right: Red, Green and Blue. The RGB system controls the lights on the screen. A TV is the same.

Dark and Light Colours

To understand the code, think of a place with no light. That would be a dark place. 000 000 000 represents no light, which is black (000000 in hex). The more light you get, the brighter the screen, so 255 255 255 is the maximum amount of light you can have, so this number represents white (ffffff in hex). The thing to remember is that dark colours have low numbers (no light) and light number have high numbers.

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