Forma
“form”
primarygeometricoptimistic
Flat circles, squares and triangles in red, blue and yellow, set in two corners of a warm white page.
A blue circle, a red circle, a yellow square and triangle and thin black lines in two corners of a pale page. Held still, as it is while you read.
The plate
Primary colors and pure geometry, in the spirit of the modernist design schools of the 1920s. By day a warm off white page holds a blue circle, a yellow square and a red quarter ring in the top left corner, and a red circle, a yellow triangle and a blue arc in the bottom right, tied together by thin black lines and small grids of dots. By night the page turns to charcoal and the same shapes deepen so the text stays easy to read. While Claude works the shapes turn or slide along straight lines one at a time, like a hanging mobile, and they hold still when the answer is ready.
While Claude works
The spinner takes one of these words in place of “Working”. When the app names the step it is on, that name stays.
- Composing
- Squaring up
- Drawing circles
- Building
- Setting the grid
- Making
After a turn of 20 seconds or more, Forma plays a soft chime under a second and a half long.
With /tessera music, a quiet loop of its own plays while Claude works and stops when the answer is ready. It is off until you ask for it.
Palette
Light
- Page
#f2eee4 - Card
#f6f3ec - Panel
#faf8f3 - Text
#2a2823 - Secondary
#3f3c34 - Muted
#514e45
Dark
- Page
#252420 - Card
#2a2925 - Panel
#2f2e29 - Menu
#35342e - Text
#e5e1d6 - Secondary
#cbc6b9 - Muted
#b6b1a4
Roles
- Accent
#2f5fd0 - Danger
#d63a2b - Success
#3a9a4e - Warning
#e5ad12 - Pro
#8b52c8
Measured
Standard contrast. Body text is held at 9:1 to 14:1. Here it measures 12.7:1 in light and 11.9:1 in dark. Vivid accents.
| Reading | Light | Dark |
|---|---|---|
| Body text on the page | 12.7:1 | 11.9:1 |
| Muted text on the page | 7.2:1 | 7.3:1 |
| Page lightness | 95% | 26% |
| Glass | 72%, 18 pt blur | 72%, 18 pt blur |
Contrast is the WCAG ratio. Muted text is held at 4.5:1 or better. Lightness is OKLCH, where 0% is black and 100% is white.
Install
Hang Forma
-
1 In the desktop app
Click + next to the prompt box and choose Plugins. Add the marketplace btahir/tessera, then add the tessera plugin.
btahir/tessera -
2 In a terminal session
Paste this at the prompt.
/plugin install tessera --marketplace btahir/tessera -
3 Ask Claude
Send this sentence in any session.
Install the tessera plugin from the btahir/tessera marketplace on GitHub.
Then
The tessera plugin holds all twenty-five plates.
Type /tessera forma to hang Forma.
/tessera still stops the motion. Sound has three levels: /tessera quiet is silence,
/tessera sound is a chime after long turns (the default), and /tessera music adds the room's own
quiet loop while Claude works. Your choices are kept across sessions.
Only Forma
Each plate also installs by its own name, and its commands use that name, such as /forma still or /forma music.
/plugin install forma --marketplace btahir/tessera Where it shows
Themes appear in the Claude Code desktop and mobile apps. The terminal keeps its own colors. The chime plays on macOS only.