This is Microsoft Outlook when selecting specific bottom navigation buttons they turn blue to signify they have been clicked. This blue is used across many  Microsoft applications making it personalized to their brand.

Possible example

Show brand colors at memorable moments that reinforce your brand’s style.

University of Michigan - Ann Arbor

Principles


Color indicates which elements are interactive, how they relate to other elements, and their level of prominence. Important elements should stand out the most.

Hierarchical

Text and important elements, like icons, should meet legibility standards when appearing on colored backgrounds.

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Related

Learn After