nostr:npub1hwzna5706gkfu7963zctxy0978kfxsva4zf8nq2zx93rtrm4yj8ssag6cs Hi, you can change the hashtag color using a custom theme. (Mona Settings > Appearances & Themes)

You could also just install these themes:

Classic Hashtag Light: mona-cat://8303

Classic Hashtag Dark: mona-cat://8075