# How to divide circle of colors into named segments?

Is there some convention to divide circle of colors into named segments? I want to define segments as basic colors, like red, orange, yellow, green, cyan, blue, magenta and pink. Problem is: where to draw the exact lines between the colors?

I asked similar question also on SO, but as it involves maybe even more graphic designer experience, I feel this site maybe even more appropriate.

EDIT To be a bit more specific: I am talking about HSL colorspace color circle.

EDIT 2

I made rough dividing like this:

``````  1-15 red
16-50 orange
51-72 yellow
73-155 green
156-185 cyan
186-268 blue
269-310 magenta
311-344 pink
345-359 red
``````

It suits for my needs, more or less. I ask: is there someone already done something like that?

• There are a infinite ways to create a color circle. There are also infinite interpretations of colors. This question is too broad for StackExchange. I recommend that you spend some time learning about color theory and color systems. Mar 23, 2021 at 14:02
• I have already seen the classic red, yellow, green, cyan, blue magenta, with 60° on each segment. But, as Zach said earlier it's a mater of interpretation, i don't think there is a convention, and it depends on the purpose and the precision. Mar 23, 2021 at 16:12
• I started writing an answer for this but stopped as I realized it was the start of a novel going off in different directions. Really a general answer seems impossible. Could you perhaps provide some background info on what kind of images/pixels you are trying to classify and what the purpose is? Mar 25, 2021 at 11:33
• @Wolff To summarize my purpose shortly: this is a part of image search functionality for our bookstore. During years we had lot of clients who come to us and want to find "this red book, you know". So, I'd like to index all our books's images, so I could query them by their dominant colors (as one parameter in wider query, of course).
– w.k
Mar 26, 2021 at 1:18
• @w.k, Ah, that's actually valuable info! Maybe a pure HSL color wheel approach isn't the best way then. Because with full saturation and lightness and only focusing on hue, you are missing some colors books can have like black, gray, brown and beige. Maybe the question could be updated to include this info? Try to take a look at how search engines categorize colors: Google, DuckDuckGo. I don't now exactly how they distinguish though. Mar 26, 2021 at 7:32