The identity, and the reasoning behind it.
Everything a designer, printer or agency needs to apply the 28th Day Technology brand correctly.
A month, with one day marked
Twenty-eight cells in a seven-by-four grid — a calendar month laid flat. The top row sits lighter, the way a calendar's weekday header does. The twenty-eighth cell is orange: the day the work goes live.
It is built only from rectangles, so it stays sharp at any size, needs no outlining for print, and reduces to a single ink without losing its shape.
- Clear space: one full cell width on every side.
- Minimum size: 24px wide on screen, 10mm in print. Below that, use the square version.
- Single colour: render all 28 cells at full strength in one ink. The final cell keeps its position but loses its colour — that is the accepted compromise.
- Never round the cells, change the gap, rotate the grid, add a shadow, or recolour the twenty-eighth cell.
Six values, one accent
Neutrals carry the work. Orange marks completion and action, and nothing else — if a layout is more than about five per cent orange, something is wrong.
Two faces, clearly divided
Plus Jakarta Sans
Everything: headings, body, buttons, navigation. Weight 700–800 for headings with tight tracking, 400 for running text. Sentence case — never all caps.
IBM Plex Mono
Labels only: eyebrows, day numbers, spec rows, tags. Always uppercase with 0.14–0.16em tracking. Never for body copy.
- Both are self-hosted in
assets/fonts/— no Google Fonts call, so the site loads faster and sends nothing to a third party. - Headings are sentence case with letter-spacing around −0.032em.
- Numbers use tabular figures so columns of data line up.
- No italics anywhere. Emphasis is weight or colour.
How we sound
- Plain, specific, unhurried. A short declarative sentence beats a qualified one.
- Name the problem before the solution.
- Concrete over superlative. "Twenty-eight days", not "rapid". "You own the code", not "client-centric".
- Admit the trade-off. Naming what an approach costs is the most persuasive thing on the page.
- Banned: cutting-edge, synergy, best-in-class, leverage as a verb, seamless, revolutionary, "we are passionate about".
Want the source files?
Every mark is in the logo folder as editable SVG, plus PNG and JPEG for anywhere that will not take vectors.