A ride through AOSP's new colors
summary
Monet is the OS-level wallpaper-driven theming engine implemented as a SystemUI package plus wallpaper manager/service and a wallpaper observer that decodes a cropped bitmap, runs quantization (K‑means and Celebi variants), scores swatches by population and hue, then maps the seed into an HCT-based color scheme producing 13 tonal shades. Low‑RAM builds (<1 GB) use an older quantizer and fewer colors. Runtime flow writes system resource IDs and applies overlays via ThemeOverlayController/ThemeOverlayApplier so Material 3 Compose can consume a tonal palette and dynamic color tokens.
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chapters (16)
- 0:00Introduction and agenda
- 2:14Material Design overview
- 4:41What is Monet
- 8:33Wallpaper manager service
- 9:57Monet in System UI
- 11:41Color extraction logic
- 13:27Image quantization theory
- 15:11Color science and HCT model
- 18:22Why Monet as the name
- 18:43Color swatches and scoring
- 20:27System theme re-evaluation
- 22:11Color scheme propagation
- 23:36Material 3 and Compose
- 25:18Building tonal palettes
- 26:03Material You future
- 27:04Q&A and closing
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