# How did they do that?

**URL:** <https://forum.kirupa.com/t/how-did-they-do-that/219911>\
**Category:** Uncategorized\
**Created:** [March 21, 2007, 2:29am UTC](https://forum.kirupa.com/t/how-did-they-do-that/219911 "2007-03-21T02:29:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![joshchernoff](https://yyz1.discourse-cdn.com/flex011/user_avatar/forum.kirupa.com/joshchernoff/32/1852_2.png) [@joshchernoff](https://forum.kirupa.com/u/joshchernoff)\
**Post date:** [March 21, 2007, 2:29am UTC](https://forum.kirupa.com/t/how-did-they-do-that/219911/1 "2007-03-21T02:29:58Z")

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[http://www.etsy.com/color.php](http://www.etsy.com/color.php) here the link.

is there some type of algorithm to check the primary color of a image, may be then they kept trace of that in a Db?

I want to reproduced that. well not that swf but how they made a catalog by the color of a item. Way cool if you ask, I see potential for photo catalog and arts of all kinds.