MD3 Themes for OpenCode TUI

194 Material Design 3 (Material You) themes for the OpenCode TUI: 9 variants × 12 hues (monochrome only ships hue 0), plain + OLED. Each file carries both light and dark appearances (OpenCode switches itself).

Active set is generated from src/dynamic/ (OpenCodeDynamicSchema + OpenCodeDynamic: MD variant + HCT source in, all v2 tokens out). deprecated-theme/ keeps the archived V1 static set.

Light	Dark

More screenshots in docs/ on GitHub.

Requirements

• A terminal with truecolor support (COLORTERM=truecolor), otherwise colors degrade to the nearest 256-color approximation.
• Node.js 22+ (installer only; the themes themselves are plain JSON).

Install

npx -y -p @sandlada/opencode-material-theme opencode-md3-themes install

Subset example (expressive greens, plain only):

opencode-md3-themes install --variant expressive --hue 120,150 --oled plain

Or copy the files manually (src/themes/ — the v2 set):

git clone --depth 1 https://github.com/sandlada/opencode-material-theme.git
mkdir -p ~/.config/opencode/themes
cp opencode-material-theme/src/themes/*.json ~/.config/opencode/themes/

Then pick a theme with /theme. Theme files are not hot-reloaded: restart the TUI (or leave and re-enter the session) after installing or switching light/dark mode — see the upstream-issue note below.

Theme names

md3-{variant}-{hue}[-oled].json, all lowercase:

• {variant}: monochrome, neutral, tonal-spot, vibrant, expressive, fidelity, content, rainbow, fruit-salad
• {hue}: HCT hue 0-330 step 30 (monochrome only ships hue 0, source is Hct.from(hue, 75, 50))
• -oled: the file whose dark half is pitch-black

Contributing

npm install
npm --prefix dev-app install
npm run dev:app        # theme lab: variant/HCT controls, TUI mock, export
bun scripts/check-dynamic.mjs                    # validate 648 combos
bun scripts/generate-dynamic-matrix.mjs --out ./src/themes   # rebuild 194

Known upstream issue

Light/dark switching can leave stale colors (e.g. markdown list text keeps the old mode's color) until restart — an OpenCode TUI bug, not a theme bug: anomalyco/opencode#55735, fix PR anomalyco/opencode#56323 (open, unmerged).

License

MIT, copyright Kai-Orion & Sandlada.