Atramentum
“ink”
starkexactprinted
Black ink on white newsprint, with halftone dots in two corners.
If you like GitHub High Contrast or Modus, you will feel at home here.
Halftone dots in two corners of a plain printed page, with a rule along the top. Held still, as it is while you read.
The plate
A printed page with no words on it. By day it is black ink on white newsprint, by night off white on near black. Two opposite corners hold fields of halftone dots that shrink toward the middle, a heavy rule and a thin rule run along the top like a masthead, and a registration cross sits in a corner. While Claude works the dots swell and shrink in a slow wave, 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.
- Setting type
- Inking the plate
- Pulling a proof
- Locking the forme
- Running the press
After a turn of 20 seconds or more, Atramentum 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
#f8f8f6 - Card
#fbfbf9 - Panel
#fdfdfc - Text
#131312 - Secondary
#2b2b29 - Muted
#464644
Dark
- Page
#111211 - Card
#161716 - Panel
#1b1c1b - Menu
#212220 - Text
#edece7 - Secondary
#cfcec8 - Muted
#adaca6
Roles
- Accent
#1f5fd6 - Danger
#d42c2c - Success
#1e7f45 - Warning
#d08a00 - Pro
#7a3fd1
Measured
High contrast. Body text is held at 14:1 and up. Here it measures 17.5:1 in light and 15.9:1 in dark. Vivid accents.
| Reading | Light | Dark |
|---|---|---|
| Body text on the page | 17.5:1 | 15.9:1 |
| Muted text on the page | 8.9:1 | 8.3:1 |
| Page lightness | 98% | 18% |
| Glass | 75%, 20 pt blur | 75%, 20 pt blur |
Contrast is the WCAG ratio. Muted text is held at 7:1 or better. Lightness is OKLCH, where 0% is black and 100% is white.
Install
Hang Atramentum
-
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 atramentum to hang Atramentum.
/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 Atramentum
Each plate also installs by its own name, and its commands use that name, such as /atramentum still or /atramentum music.
/plugin install atramentum --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.