As part of the Zabbix legacy UI modernization effort, we need to improve the visual appearance of the sidebar navigation.
Existing Blue theme sidebar navigation is visually complex, 27 color values are used on different levels and for various states, which do not provide any real value for users or UI.
It is difficult to visually distinguish nav item states during navigation interactions. Together with decorative elements like borders, shadows, inconsistent icon and text sizes, this all contributes to overall navigation complexity and non professional look.