For buttons use

<button class="btn">Button</button>

Buttons with brand colors

<button class="btn">Button</button>
<button class="btn btn-neutral">Neutral</button>
<button class="btn btn-primary">Primary</button>
<button class="btn btn-secondary">Secondary</button>
<button class="btn btn-accent">Accent</button>
<button class="btn btn-ghost">Ghost</button>
<button class="btn btn-link">Link</button>

Buttons with state colors

<button class="btn btn-info">Info</button>
<button class="btn btn-success">Success</button>
<button class="btn btn-warning">Warning</button>
<button class="btn btn-error">Error</button>

For more buttons examples check https://daisyui.com/components/button/