Firstly, it’s important to note that Quasar is Material-inspired, but not pixel-perfect Material-compliant, as elements should look good on both Material and iOS themes, on many screen sizes and platforms, etc.

Overriding Quasar default style is very simple: when you inspect element, you’ll notice that Quasar exposes classes like q-tabs , q-tab, q-tabs-scroller, q-tab-icon, q-tab-label and active (for current tab). Just target those CSS classes, not component names.