Hello Sports,
How do we edit the color given to every category?
Visit a category page, press edit button (at the upper right of each category).
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Very cool, I fiddled with it and yes that did it.
I had felt worried that if I edited any of the ‘background color’ settings it would edit the appearance of the whole category.
Too kind of you to personally assist a layman like myself.
You bring up a good point…I’ve always just “known” to change the background color setting to change the color of the category, but never thought about why it’s called “Background Color”. @codinghorror is there a historical reason for this name? Perhaps this is from back when box was the default category style?
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I would have known what to do intuitively if it featured a simple ‘Badge color’ with an accompanied color palette beside it. Please do not consider this a complaint at all, just my humble opinion.
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I didn’t make the connection between the ‘background color’ & the category color today, that doesn’t seem obvious IMHO.
The fact that a padlock’s displayed next to the square showing the badge color made me initially assume that it couldn’t be changed either, until I found this topic.
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For what it’s worth, I had the same confusion with this until I found this thread. I made the same assumption as others did in this thread. I didn’t understand the colors with a check represented colors already used by other categories. A text label to specify what the check mark means would be helpful to make first-use more intuitive. 
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Completely agreed with concerns exposed above. I’ve always thought that the category “badge color” cannot be changed. No idea that “Background color” shows the already used ones and that, by changing it, the “badge color” is changed.
This can be improved at UX IMHO.
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¡También tuve la misma confusión!
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Además, no ayuda que al crear la categoría por primera vez tengas la opción de elegir un “color de fondo” y un “color de primer plano”, y de repente, cuando quieres editarla, una de las dos opciones desaparece y aparece un candado junto al color de la insignia.
Estoy seguro de que esto se puede simplificar con una terminología diferente o algo similar.
Los colores de fondo y primer plano de la categoría son útiles si utilizas el componente de encabezado de categoría.
Consulta ejemplos aquí: