How to learn, jam and compose music with colors, notes and JavaScript? Chromatone.center is an interactive laboratory of colors and sounds, intervals and chords, synths and simulations, visualizations and exploratory music instruments. Theory section provides important pointers to knowledge to be learned out of own interest at own pace. Practice section is full of highly interactive instruments to get experimental with. As the author and developer of this open-source visual music digital garden I will show what it has inside and how it's built with modern JS tech: Vue 3, Vitepress, VueUse, and UnoCSS, along with all the modern browser APIs - WebAudio, WebMidi, WebGL, Wasm, and more.