Colour Names
At the top of the Color Names tab, there is a filter field. Color Converter will search for all colours that contain the string in the filter field. For example, if you type "light", Color Converter displays all colours containing "light", from LightBlue until LightYellow4. If you enter "blue", it will find AliceBlue, but also Blue, BlueViolet, PowderBlue and DeepSkyBlue4.Clicking on a colour name sets the colour of the Color Picker to that colour. This means that the Convert tab will also display the value of that colour in all colour spaces. From there, you can copy the colour name.
Naturally, you can also copy the colour name from the Convert tab and paste it into the filter field on the Color Names tab.
The Color Names list follows a standard, which adheres to an old Unix tradition. These color names are used by the X11 window system and have been adopted by many Linux flavours and their window systems. You can find more about it on Wikipedia.
