Just to clarify a bit: “other animals” isn’t entirely limited to inverts. Here’s what the current coloring scheme looks like:
There are four kingdoms with iconic colors, then orange for two classes of Arthropoda and Mollusca, then blue for five classes of Vertebrata. Then everything in Animalia not in one of the previous categories is also colored blue.
The suggestion is to change that last big box to be orange. This would mean the rest of Arthropoda would be orange like the insects and spiders, but it would also mean, for example, that Elasmobranchii would be orange.
The only way to keep Elasmobranchii in blue and Arthropoda in orange would be to redefine the iconic taxa, which would be a much bigger change than just switching other animals from blue to orange.
Related discussions:
https://forum.inaturalist.org/t/why-arent-all-arthropods-displayed-as-orange-icons-on-the-map/11988
https://forum.inaturalist.org/t/incorrect-color-code-for-a-species/3970
https://forum.inaturalist.org/t/create-iconic-taxa-for-bacteria-archaea-and-viruses/1464