Arc design specAI Products

Playful, warm marketing: a cream canvas framed by electric-blue scalloped bands, a serif hero over a pastel wash, rounded Marlin brand type, and a black CTA pill.

⚠ native app, site only

Browse Arc in the interactive gallery

Captured from the live site's computed styles into a prompt-ready DESIGN.md you can paste into Cursor, v0, Lovable, Bolt or Claude Code. Below is a summary of each captured surface.

Marketing site

Source: arc.net (live DOM, full CSS token system), 2026-07-09 (desktop 1512px). Coverage: marketing home + nav + hero + product-window mockup. App: n/a — Arc/Dia is a native macOS/Windows app, no web product (site only). Responsive: token-based (--navbar-height, --page-padding) but mobile rendering not verified.

Visual Theme & Atmosphere

Playful, warm, hand-crafted marketing that feels like a friendly indie product rather than a corporate browser. The page sits on a warm cream #FFFCEC canvas washed with a soft pastel gradient (peach → lavender → cream) behind the hero, framed top and bottom by vivid electric-blue #3139FB bands with a signature scalloped / wavy torn-paper edge where blue meets cream. Type mixes personalities on purpose: a rounded square-grotesque (Marlin / Marlin Soft SQ) for confident brand headings and an editorial serif for large hero lines, with ABC Oracle carrying body copy — the combination reads warm and human. A single black rounded CTA pill and playful pastel accents (coral, salmon, light-green) keep it optimistic. Feels: playful, warm, crafted, optimistic.

Color Palette & Roles

Brand core

TokenHexRole / usage
brandBlue#3139fbElectric-blue header/footer bands, borders, links
brandDeepBlue#2404aaDeeper blue accents
brandDarkBlue#000354Darkest blue text on blue
brandOffwhite#fffcecWarm cream page canvas
brandRed#fb3a4dAlert / playful red accent
focusOutline#96c4ffFocus ring (pale blue)
highContrast / lowContrast#000 / #fffText / inverse

Playful secondary ("students" palette)

TokenHexRole
arc_blue#0c50ffAlt bright blue
pinkish#f25e6bCoral-pink accent
salmon#f2c2acWarm fill
light_green#d3e081Lime fill
off_white#f5f4e2Warmer cream panel
light_grey#e1e0ceNeutral warm panel (hover #d7d6c4)
text_dark / text_light#766e6a / #97928fWarm-grey body / muted

Primary ramp is a coral-red (primary6 #fa4531); secondary ramp is teal-green — used for illustration/data, not chrome.

Rule: cream canvas + electric-blue bands is the frame; black is reserved for the primary CTA and headings. Pastel accents decorate, blue signals interactive.

Typography Rules

RoleSize/LineWeightTrackingFamily
Hero (editorial)~44–48400tightSerif
Brand heading (h1)32 / 31.2700-1.6pxMarlin Soft SQ
Body20 / 244000ABC Oracle
Nav / UI16400–5000Marlin / Inter

Pattern: rounded Marlin for brand voice + a serif for big editorial hero lines; ABC Oracle for readable body. Weight goes up to 700–800 for punchy headings (unlike the dev-tool captures).

Also documented in the full DESIGN.md: Component Stylings, Layout Principles, Depth & Elevation, Motion, Backgrounds, Effects & WebGL, Do's and Don'ts, Responsive Behavior, Agent Prompt Guide.