The Rules: When you load the page, and when you click "Restart with New Colors", two different colors are randomly generated. The one, a Target color, is represented by three hexadecimal digits: 0-F. This value is "hidden" except by the color being represented. You also have a Current color which you are striving to make match the Target. You can then add or subtract red, blue, and green by steps of 1 (again, a maximum of 0, and a maximum of F, in each color). Or you can click "match" to set the Current red/blue/green to the Target red/blue/green. When you match the color precisely, the words "match" will show up. You can then choose another starting Target/Current color and try again. If you need help, click "Show Target" or "Show Current" to get the values, in RGB/Hex to show up.
History: The idea was original to make a game, much like this, where you crawled around potential HSV space trying to match colors, in a certain number of moves, by changing the Hue, Saturation, and Value. This game is a much simpler version of that but has a similar vibe.