Brand identity.
The Fosforonero mark comes straight out of the periodic table: Phosphorus, element 15, and specifically its most stable allotrope — black phosphorus. This page documents the project's visual system: the symbol, its origin, palette and typography.
The name
The name was born at university, while I was studying for a chemistry exam. I got fascinated by black phosphorus: the most stable allotrope of phosphorus (P, Z = 15, group 15 — the nitrogen group). Unlike white phosphorus (unstable, pyrophoric) and red phosphorus (amorphous, common in matches), black phosphorus is the most ordered and thermodynamically stable form.
It has a puckered two-dimensional layered structure — similar to graphite — but it's a direct-bandgap semiconductor, meaning it conducts electricity in a controlled way, unlike graphene which is a pure conductor. Exfoliated down to a single atomic layer it becomes phosphorene, one of the most actively studied materials for the electronics of the next decade.
A quiet, dense, stable material — built to last. The right name for the kind of software I try to build.
The symbol
The logo is a periodic-table-style tile, built entirely in HTML/CSS — no SVG, no icon font. It scales crisply at any resolution and inherits its colors from CSS variables, so it adapts to the surrounding context. Below the atomic mass, the «3p³» shorthand stands for the outer subshell of the electron configuration — the portion that places Phosphorus in the p-block of the periodic table and governs the element's chemistry.
- 15Atomic number
- PPhosphorus symbol
- 30.97Atomic mass (u)
- [Ne] 3s² 3p³Electron configuration
Negative variant
For dark surfaces (dark sections, overlays, favicons in dark-mode browsers) both variants have a negative treatment: the fill becomes ink, the symbol turns white, the phosphor accent keeps the brand identity.
Colors
A tight palette — three neutral backgrounds, two ink levels, a single accent. Phosphor green (#00A341) is the only saturated color; everything else is grayscale so as not to distract from the content.
Typography
Two variable families, both self-hosted via next/font: Space Grotesk for display, JetBrains Mono for data, code and micro-labels. Zero third-party requests, zero CLS.
Scientific reference
Atomic number Z = 15. Atomic mass 30.974 u. Full electron configuration: [Ne] 3s² 3p³ — on the logo we only show «3p³», the valence portion, the electrons that determine the chemistry of the element. Group 15 (nitrogen group), period 3, p-block. Main oxidation states: +5 (most common), ±3, +4. Known allotropes: white (pyrophoric, m.p. 44.2 °C), red (amorphous, sublimes at ~170 °C, used in matches), black (most thermodynamically stable, layered semiconductor) and violet. Phosphorus was first isolated in 1669 by the German chemist Hennig Brand. The name comes from the Greek φωσφόρος (phōsphóros) — «light-bearer».