When characters or objects are arranged according to the seven-color spectrum. At least the three primary colors - [[red]], [[yellow]] and [[blue]] - can be present, but they should be in order. 

The theme should be easily visible in the thumbnail, <b>so not every image of [[Flandre Scarlet]]'s wings or [[Hinanawi Tenshi]]'s dress can qualify</b>.

h4. See also

* [[color coordination]]
* [[rainbow]]
* [[rainbow gradient]]
* [[color wheel challenge]]
* [[Tag Group:Colors]]