xAI Design System

Overview

xAI is Elon Musk's frontier-AI lab, and the website wears that posture with engineered restraint: a near-black canvas {colors.canvas} (#0a0a0a) edge-to-edge, white outline pills as every interactive element, and a single proprietary geometric sans Universal Sans carrying every display headline at weight 400. There is no gradient hero, no atmospheric backdrop, no product screenshot. The brand reads as confidently sparse — a research lab announcing its work rather than a SaaS marketing site.

Type is the second decisive voice. Universal Sans carries every display at weight 400 (regular) with aggressive negative tracking (-2.4px at 96px, scaling down through the display ladder). For technical labels, eyebrows, and metric counters, the brand pairs Geist Mono (uppercase, 1.4px positive tracking) — every section eyebrow reads as a code comment more than a marketing label.

Every interactive element is a pill ({rounded.pill} 9999px) with a 1px white-translucent border rgba(255, 255, 255, 0.25). The button shape never varies — the same translucent-white pill carries "Try Grok", "Read announcement", "Custom Voices", "Sign up now", and every "Read" anchor. The pill is the entire shape system.

Key Characteristics:

• A single near-black canvas ({colors.canvas} #0a0a0a) with white outline pills as the entire interactive vocabulary.
• Universal Sans weight 400 for display, Geist Mono uppercase tracked for labels — the two-face contrast IS the brand voice.
• Every button is a {rounded.pill} outline with translucent-white border. The brand never uses filled CTAs except for one variant (white-filled pill on Sign Up).
• Cards are tight {rounded.sm} 8px rectangles in a slightly-lighter {colors.canvas-card} (#191919) fill with hairline border. No shadows.
• A muted accent palette of sunset-orange #ff7a17 / dusk-purple #7c3aed / twilight-violet #c4b5fd / breeze-blue #a0c3ec lives in the design tokens but appears rarely on the main marketing surface — reserved for product illustrations / icons.
• Massive negative letter-spacing on display headlines (-2.4px at 96px) gives the typography a precise, gathered look.

Colors

Brand & Accent

• White ({colors.primary} — #ffffff): The brand's primary "color" — used as button outline, button-primary fill, all display text. The brand's signature is white-on-near-black.
• Sunset Orange ({colors.accent-sunset} — #ff7a17): A warm orange used inside product illustrations and accent moments.
• Sunset Soft ({colors.accent-sunset-soft} — #ffc285): The lighter variant of the sunset accent.
• Dusk Purple ({colors.accent-dusk} — #7c3aed): Deep purple used inside product illustrations.
• Twilight ({colors.accent-twilight} — #c4b5fd): Soft violet — illustrative accent.
• Breeze Blue ({colors.accent-breeze} — #a0c3ec): Soft blue — illustrative accent.
• Midnight ({colors.accent-midnight} — #0d1726): Deep blue-black for illustrative backgrounds.

Surface

• Canvas ({colors.canvas} — #0a0a0a): The default near-black page background. The brand's only true surface.
• Canvas Soft ({colors.canvas-soft} — #1a1c20): A slightly lighter dark fill used for hovered nav items and tooltips.
• Canvas Card ({colors.canvas-card} — #191919): The charcoal card fill used inside product-feature cards.
• Canvas Mid ({colors.canvas-mid} — #363a3f): A mid-dark used for nested surfaces and code mockup backgrounds.
• Hairline ({colors.hairline} — #212327): 1px solid dividers on dark surfaces.

Text

• Ink ({colors.ink} — #ffffff): Default text on canvas — pure white.
• Ink Hover ({colors.ink-hover} — #fafaf7): Slightly off-white used for hover states (filtered out per no-hover policy in component specs).
• Body ({colors.body} — #dadbdf): Secondary body text — supporting copy in lighter weight.
• Body Mid / Mute ({colors.body-mid} — #7d8187): Mid-emphasis body and mute text — captions, fine print.

Semantic

The brand doesn't surface a separate semantic palette on the marketing site. Validation cues use the white-on-canvas hierarchy.

Typography

Font Family

Two faces ladder the system:

1. universalSans — proprietary geometric sans used for every display, body, button, and link role. Weight 400 only on the marketing surface (the brand's restraint is part of the voice). Negative letter-spacing at display sizes is the visual signature.
2. GeistMono — used for uppercase section eyebrows, label captions, and metric counters. Positive tracking (1.2 – 1.4px) at 12 – 14px.

Hierarchy

Principles

• Weight 400 for everything. The brand never bolds. Negative tracking + size hierarchy do the emphasis work.
• Tight negative tracking on display sizes. Reverting to neutral tracking loses the precision feel.
• GeistMono uppercase for eyebrows. Tracked positively (1.4px) to make the mono read as a code comment.

Note on Font Substitutes

universalSans is proprietary. Open-source substitutes:

• Display + body — Inter weight 400 with -0.04em to -0.02em letter-spacing at display sizes comes closest. Geist is the second-best option.
• Mono — Geist Mono is the documented brand companion; JetBrains Mono or IBM Plex Mono are alternates.

Layout

Spacing System

• Base unit: 4px.
• Tokens: {spacing.xxs} 2px · {spacing.xs} 4px · {spacing.sm} 8px · {spacing.md} 12px · {spacing.lg} 16px · {spacing.xl} 24px · {spacing.2xl} 32px · {spacing.3xl} 48px · {spacing.4xl} 64px.
• Section padding: hero / content bands at {spacing.4xl} 64px on desktop.
• Card interior padding: {spacing.xl} 24px.

Grid & Container

• Marketing content centres at ~1200px.
• Product / announcement card grid: 2-up at desktop, 1-up at mobile.

Responsive Strategy

Breakpoints

Touch Targets

Buttons render ~32 – 40px tall (8 vertical padding + 20 line). Mobile inflates touch area to meet WCAG 44 × 44px.

Image Behavior

The brand uses sparse SVG illustrations for product moments (Grok, Voice, API). No photography on the marketing surface.

Elevation & Depth

The brand uses no shadows. Hairline borders carry all elevation cues.

Shapes

Border Radius Scale

Components

Buttons

button-primary — the rare white-filled pill (used on a single Sign Up CTA).

• Background {colors.primary} white #ffffff, text {colors.on-primary} near-black #0a0a0a, 1px solid white border, label {typography.button-md}, padding {spacing.xs} {spacing.md}, shape {rounded.pill} 9999px.

button-outline-on-dark — the canonical white-outline pill, used for every non-primary CTA.

• Background {colors.canvas} (transparent in practice — rgba(0,0,0,0)), text {colors.ink} white, 1px solid {colors.hairline} #212327 border (translucent white at runtime), same typography / padding scale / shape.

button-outline-sm — the smaller outline pill used in card-cluster CTAs.

• Same as button-outline-on-dark with tighter padding {spacing.xs} {spacing.md}.

Cards & Containers

card-content — the default content card.

• Background {colors.canvas-card} (#191919), text {colors.ink}, 1px solid {colors.hairline} border, padding {spacing.xl}, shape {rounded.sm} 8px.

card-feature-product — the product-feature card (Grok / Voice / API).

• Same chrome as card-content. Hosts an SVG illustration + headline + body + outline pill CTA.

Inputs & Forms

text-input — the standard text input on dark.

• Background {colors.canvas-soft} #1a1c20, text {colors.ink}, 1px solid {colors.hairline}, body in {typography.body-md}, padding {spacing.md} {spacing.lg}, shape {rounded.sm} 8px.

Navigation

nav-bar — the sticky top nav.

• Background {colors.canvas}, text {colors.ink}, padding {spacing.md} {spacing.xl}.

nav-link — link items inside nav.

• Text {colors.ink}, set in {typography.body-sm}.

footer — the footer band.

• Background {colors.canvas}, text {colors.body} #dadbdf, padding {spacing.3xl} {spacing.xl}. Body in {typography.body-sm}.

Signature Components

hero-band — the dark hero with massive display headline.

• Background {colors.canvas}, text {colors.ink}, padding {spacing.4xl} {spacing.xl}. Headline in {typography.display-xl} (96px weight 400 with -2.4px tracking).

content-band — the standard content section.

• Background {colors.canvas}, text {colors.ink}, padding {spacing.4xl} {spacing.xl}. Section headline in {typography.display-md} preceded by a {typography.caption-mono} UPPERCASE GeistMono eyebrow.

eyebrow-mono — the uppercase tracked GeistMono label above every section headline.

• Text {colors.ink}, set in {typography.caption-mono}. The brand's signature label style.

divider-hairline — the 1px line between section bands.

• 1px solid {colors.hairline} #212327.

Examples (illustrative)

Auto-derived kit-mirror demonstration surfaces (scripts/derive-examples-block.mjs). Each ex-* entry references brand-native primitives so downstream consumers (/preview-design, /generate-kit) re-skin the same 10 surfaces consistently.

ex-pricing-tier — Default Pricing tier card. Re-uses feature-card chrome with brand canvas-soft surface.

• Properties: backgroundColor, textColor, borderColor, rounded, padding

ex-pricing-tier-featured — Featured/highlighted tier — polarity-flipped surface (dark fill + light text in light mode, light fill + dark text in dark mode).

• Properties: backgroundColor, textColor, rounded, padding

ex-product-selector — What's Included summary card — re-purposed for SaaS / B2B verticals (NOT a literal product gallery).

• Properties: backgroundColor, rounded, padding

ex-cart-drawer — Subscription summary — re-purposed for SaaS / B2B (line items per add-on, not literal cart).

• Properties: backgroundColor, rounded, padding, item-divider

ex-app-shell-row — Sidebar nav row inside the App Shell example. Active state uses brand primary as the indicator.

• Properties: backgroundColor, activeIndicator, rounded, padding

ex-data-table-cell — Default data-table th + td chrome. Header uses mono-caps eyebrow typography; body uses body-sm.

• Properties: headerBackground, headerTypography, bodyTypography, cellPadding, rowBorder

ex-auth-form-card — Sign-in / sign-up card. Re-uses feature-card chrome with text-input primitives inside.

• Properties: backgroundColor, rounded, padding

ex-modal-card — Modal dialog surface — same chrome as feature-card with elevated shadow.

• Properties: backgroundColor, rounded, padding

ex-empty-state-card — Empty-state illustration frame.

• Properties: backgroundColor, rounded, padding, captionTypography

ex-toast — Toast notification surface — feature-card shape + medium shadow.

• Properties: backgroundColor, rounded, padding, typography

Do's and Don'ts

Do

• Reserve {colors.canvas} (#0a0a0a) as the only page surface. The brand is dark-canvas only.
• Set hero headlines in {typography.display-xl} Universal Sans weight 400 with -2.4px tracking. The precision IS the voice.
• Use {rounded.pill} 9999px on every interactive element. The pill is the brand.
• Pair Universal Sans (sentence-case) with GeistMono UPPERCASE (eyebrows, labels, metric counters).
• Use white-translucent borders for outline buttons — the brand never uses solid white borders on its outline pill.

Don't

• Don't introduce a light-mode counterpart. xAI is dark-canvas only.
• Don't bold display headlines. Weight 400 is the entire scale.
• Don't use filled buttons broadly. The brand uses outline pills almost exclusively; one Sign Up white-filled pill is the rare exception.
• Don't drop a drop-shadow on cards. Hairline borders carry elevation.
• Don't substitute Universal Sans with a generic geometric sans without adjusting letter-spacing. The negative tracking is part of the brand.

Known Gaps

• Runtime border color: the spec stores {colors.hairline} #212327 for outline-pill borders, but the live site renders translucent white rgba(255, 255, 255, 0.25) at runtime — the file does not document the alpha-channel translation.
• Gradient illustration stops: the sunset-to-dusk gradients used inside product illustrations (Grok, Voice) are not captured token-by-token; only the discrete accent colors ({colors.accent-sunset}, {colors.accent-dusk}) are documented.
• Loading states / skeleton screens: not captured from the marketing surface.
• Universal Sans variable-font axes: the proprietary face supports more weight axes than the marketing site exposes; only weight 400 is documented because that's the only weight the brand uses publicly.
• Focus rings: text-input and button focus-ring treatment is not visible on the captured surfaces. The brand likely uses a 1px white outline at full opacity, but precise extraction was not reliable.
• Nested product canvases: the Grok chat interface, API console, and developer documentation surfaces likely extend the system with code-block and tool-display primitives that this spec does not capture.