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Tensor

Hard-edged industrial UI in absolute black, clean white, and electric signal green.

Space Grotesk21 colors5 specs◐ Light & dark

Overview

Tensor is a high-contrast compute environment that communicates raw throughput through restraint. Stark black (#000000) and white (#ffffff) form the foundation, punctuated by electric green (#7AC943). This is not the lush green of nature; it is the lime-shifted light of a live processing array, sitting between chartreuse and kelly green.

The Space Grotesk font family (with Arial and Helvetica fallbacks) creates a clean, industrial typographic voice. Headings at 36px bold with tight 1.25 line-height create dense, authoritative blocks of text. The font lacks the geometric playfulness of Silicon Valley sans-serifs -- it's European, pragmatic, and engineering-focused. Body text runs at 15-16px, comfortable for reading but not generous, maintaining the sense that screen real estate is optimized like GPU memory.

What distinguishes Tensor's design from other dark-background tech sites is the disciplined use of the green accent. The #7AC943 appears in borders (2px solid #7AC943), link underlines, and CTAs -- but never as backgrounds or large surface areas on the main content. The green is a signal, not a surface. Combined with a minimal shadow system and minimal border radius (1-2px), the overall effect is of precision engineering hardware rendered in pixels.

Key Characteristics:

  • Signal Green (#7AC943) as pure accent -- borders, underlines, and interactive highlights only
  • Black (#000000) dominant background with white (#ffffff) text on dark sections
  • Open-source Space Grotesk with a platform sans fallback—industrial, compact, and clean
  • Tight line-heights (1.25 for headings) creating dense, authoritative text blocks
  • Minimal border radius (1-2px) -- sharp, engineered corners throughout
  • Green-bordered buttons (2px solid #7AC943) as primary interactive pattern
  • Bold (700) as the default voice for headings, buttons, links, and labels

Colors

Light theme
Brand
Text
Surfaces & Borders
States
Groups
Dark theme
Surfaces
Text
Neutrals
Brand
Groups
Status

Typography

Ag

Primary

Space Grotesk

Arial, Helvetica, sans-serif

Ag

Monospace companion

Space Mono

ui-monospace, monospace -- reserved for code, IDs, and numeric readouts.

Spacing

Screen

real estate is treated like GPU memory. The scale is dense from to because telemetry, tables, and model readouts are meant to be scanned, not strolled through.

The

jump is at the section boundary. Inside a panel the largest step is ; between sections it is . That gap is what separates one dark/light band from the next.

Bands

do the separating, not dividers. Alternating true-black and pure-white sections carry the scroll rhythm, so no horizontal rules are needed at section joins.

Border Radius

none0px

Full-bleed section bands, table cells, flush-joined segment groups, dividers

xs1px

Inline spans, tiny status marks, the smallest inline chips

sm2px

The system default — every button, search bar, card, input, chip, badge, tooltip, dropdown menu, tab, toggle rail, progress track, table frame and panel in the `components` block resolves to this

md4px

The ceiling for a rectangular container; used only where a large panel would look chipped at 2px — the modal is the one component that takes it

lg8px

xl12px
pill9999px
full9999px

Circular tab indicators and status dots only — NOT avatars, which take `{rounded.sm}` like every other rectangular object

Components

Buttons

Clickable actions: primary, secondary and ghost, with their states.

PrimaryBackground: transparent Text:, Border: 2px solid Radius: Padding: 11px 13px; height: 44px Hover : background fills, text flips to Use: the one committing action per view
SecondaryIdentical geometry to primary — transparent, text,,, 11px 13px padding, 44px tall Border: 1px solid — the halved border weight is the only difference Use: alternative actions alongside a primary
CompactTransparent, text,, Border: 1px solid ; padding 8px 12px; height 32px Use: toolbar and table-row controls where a 44px target will not fit
Cards & Containers

Surfaces that frame grouped content — padding, border and shadow.

Standard cardBackground, text, radius, border width 0px Sits on light sections; separation comes from the surrounding gap, since it has neither border nor shadow
Dark cardBackground, text, radius Sits on a true-black section: is one step off the page, which is exactly enough to read as a panel without introducing a border
Badges

Small markers that carry status or category at a glance.

Green badgeBackground, text,, radius, padding 2px 8px The one sanctioned exception to "green is never a fill": at badge scale the filled block is a status marker, not a surface
Inputs & Forms

Form controls — borders, labels, placeholders and focus rings.

Text inputBackground, text, Border: 1px solid ; radius ; padding 11px 13px; height 44px — matched to the button height so a field and its submit align on one row Focus : border colour swaps to ; the border does not thicken, so the field never shifts the layout
Navigation

The top bar — brand, links and the primary call to action.

Top barBackground, text,, height 56px Links are uppercase weight 700; the active item is marked with a underline rather than a fill or a pill

Elevation & Depth

LevelTreatmentUse
Flat (Level 0)No shadowPage backgrounds, inline text
Subtle (Level 1)rgba(0,0,0,0.3) 0px 0px 5pxStandard cards, modals
Green accent (Level 2)2px solid #7AC943Active elements, CTAs, selected items
Focus (Accessibility)2px solid #000000 outlineKeyboard focus ring

Shadow philosophy: Tensor is shadowless by design. There is exactly one soft shadow in the system and it exists only so a modal can be told apart from the page behind it. Everything else gains presence from value contrast — black against white — and from the green outline at Level 2. Depth is *drawn*, not simulated: an active element is not lifted, it is ringed.

Guidelines

Do

  • Draw controls as outlines — a 2px `{colors.primary}` border marks the one primary action, 1px marks the rest
  • Keep every corner at `{rounded.sm}` (2px); rank comes from border weight, not radius
  • Use `{colors.true-black}` for dark bands and nav, with `{colors.near-black}` cards one step off the page
  • Set headings, buttons, links, and labels at Space Grotesk 700; nav links uppercase

Don't

  • Don't fill a large surface with `{colors.primary}` green — the badge and a `{colors.category-1}` data mark are the only sanctioned green fills
  • Don't round past `{rounded.md}` (4px) — pills and 8px+ corners contradict the machined grid
  • Don't shadow anything but the modal, and keep that one shadow neutral, never warm
  • Don't add decorative letter-spacing — Space Grotesk already carries the character

Spacing roles

One value per role, no ranges. Control interiors come from the authored components: block;

everything else is a step off the spacing scale.

RoleStepValue
Button padding11px 13px
Input padding11px 13px
Chip padding/4px 8px
Card padding16px
Card content gap16px
Stacked row gap12px
Menu item padding/8px 12px
Menu item gap4px
Section gap80px
Page gutter32px
Icon-to-label gap8px

Iconography

  • Pack: Lucide — hard-edged and mechanical, matching the industrial geometry of the type.
  • Style: 2px stroke, square terminals.
  • Weight rule: Never soften the stroke; on signal green the 2px edge is the point.
  • Size: 20px in controls and nav; 16px inline with body text; 24px for empty states and feature moments.
  • Colour: icons inherit currentColor — never a hardcoded hex, so they follow the text token they sit beside.
  • Import: pull in icons individually, never the whole set.

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