Sierra — decoded design system

sierra.ai · light · professional · tailwind · deep decode — measured live

Sierra's design system, decoded live by Mozaika: measured color roles, type scale, buttons with real hover/focus states, motion and the brand's own tokens.

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This is a static, crawlable rendering for search & AI engines. The interactive version — filters, live decode console, copy & export — is at https://mozaika.design/decode/sierra.ai.

Decoded design system

Sierra's decoded design system: background #FFFFFF, text #302E2D, accent #006838, link #716F6C, primary #006838; type scale h1 65px / h2 44px / body 16px; 8px spacing base; 0px base radius. The single interactive/action color is #006838 — used only on interactive or must-notice elements (buttons, links, key highlights), never on large fills.

Color roles

Using these colors

• Action color #006838 — the single interactive color; only on things you click or must notice, never large fills.
• primary, accent, button_bg are all #006838 — one role, not several (the action color).
• accent #006838 — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
• link #716F6C — reads as a neutral UI color, not a link accent — verify against the reference (action = #006838).
• secondary #DAE6F4 — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.

Typography

• Heading: gtAmerica
• Body: gtAmerica
• h1: 65px
• h2: 44px
• body: 16px

Spacing

• base unit: 8px
• scale: 4px, 8px, 10px, 12px, 16px, 24px, 32px, 40px, 48px, 56px

Radii

• base: 0px
• button: 3.35544e+07px

Motion

Micro-interactions run at 250ms (dominant) with cubic-bezier(0.4, 0, 0.2, 1).

• durations: 250ms · 500ms · 300ms
• easings: cubic-bezier(0.4, 0, 0.2, 1) · ease
• animated properties: opacity, color, background-color, border-radius

Native design tokens

…and 110 more measured on the page.

Button states (measured)

• primary hover: background #4FAF62
• primary focus: background #4FAF62 · outline 2px solid rgb(0, 104, 56)

Layout (measured)

• container max-width: 1160px
• common grid: 12 columns

Motion choreography (measured)

Load order: div.otFloatingRoundedCorner

Scroll reveal: 5 elements rest at opacity 0, animate in over 300ms.

Overlay recipe (measured)

dialog panel: #FFFFFF · radius 16px

Responsive (measured)

• breakpoints: 426px · 550px · 600px · 640px · 768px · 896px
• mobile (390px): hero 32px · nav inline

Install it

Drop this measured system into any shadcn/Tailwind project in one command:

npx shadcn add mozaika.design/r/decode/sierra.ai

registry item · or query it over MCP: get_design_system("Sierra")

Export: DESIGN.md

# Sierra — Design System

> light, professional, medium, tailwind — deep decode (measured live)

## Colors

| Role | Value |
|------|-------|
| bg | `#FFFFFF` |
| surface | `#F2F2F2` |
| border | `#DFDFDF` |
| text | `#302E2D` |
| text_muted | `#7E7D7C` |
| primary | `#006838` |
| accent | `#006838` |
| link | `#716F6C` |
| secondary | `#DAE6F4` |
| button_bg | `#006838` |
| button_text | `#FFFFFF` |

**Using these colors**

- **Action color** `#006838` — the single interactive color; it appears only on things you click or must notice (buttons, key highlights), never on large fills or backgrounds.
- `primary`, `accent`, `button_bg` are all `#006838` — one role, not several (your action color).
- **accent** `#006838` — THE accent / action color — interactive & must-notice only (buttons, links, focus, one key highlight); never large fills or backgrounds. Scarcity is what makes it read as designed.
- **link** `#716F6C` — reads as a neutral UI color, not a link accent — verify against the reference (action = #006838).
- **secondary** `#DAE6F4` — optional secondary accent — LOW decode confidence; use rarely (a status color or a single decorative moment) or omit it entirely. Prefer one accent unless the reference clearly shows two.
- **Page coverage** (full-page screenshot pixels): `#FFFFFF` 97.4% · `#BBC4BE` 0.8% · `#E8E8E8` 0.8% · `#D0D9D4` 0.6%

## Typography

- Heading: **gtAmerica** _(free fallback: Newsreader)_
- Body: **gtAmerica** _(free fallback: Newsreader)_

| Role | Size / weight · line-height · tracking |
|------|------------------------------------------|
| hero | 65px / 400 · lh 72px · tracking -1.3px |
| h2 | 44px / 400 · lh 48px · tracking -0.44px |
| h3 | 38px / 400 · lh 46px · tracking -0.38px |
| body | 16px / 400 · lh 24px |
| small | 14px / 400 · lh 20px |

- Weight ladder: 400 — use these exact measured weights, not the 400/600 defaults.

> **Fonts —** gtAmerica may be proprietary — safe free fallback: Newsreader (Google Fonts).

## Spacing
- base unit: 8px (inferred from the measured scale)
- measured scale: 4px, 8px, 10px, 12px, 16px, 24px, 32px, 40px, 48px, 56px — snap all gaps/padding to these
- section rhythm: 80px top/bottom padding per section (measured)

## Radius
- base: 0px
- button: 3.35544e+07px
- card: 4px
- pill: 9999px
- sharp: 2px

## Buttons

| Button | Fill / text | Border | Radius | Padding | Font | Shadow |
|--------|-------------|--------|--------|---------|------|--------|
| primary | `#006838` / `#FFFFFF` | none | 3.35544e+07px | 0px 16px 0px 16px | 400 14px | none |
| secondary | `#F6F5F3` / `#302E2D` | none | 9999px | — | — | none |

**States (measured, not guessed)**

- primary hover: background `#4FAF62`
- primary focus: background `#4FAF62` · outline `2px solid rgb(0, 104, 56)`
- transition: `background-color 0.25s cubic-bezier(0.4, 0, 0.2, 1)`

## Motion
- durations: 250ms (dominant) · 500ms · 300ms
- easings: `cubic-bezier(0.4, 0, 0.2, 1)` (dominant) · `ease`
- animated properties: opacity, color, background-color, border-radius

Micro-interactions use the dominant duration + easing; nothing on the page animates slower than the longest duration above — don't invent springier motion.

## Their own tokens (verbatim from :root)

| Token | Value |
|-------|-------|
| `--color-blue-700` | `#345eb2` |
| `--color-green-100` | `#f4fffa` |
| `--color-gray-300` | `#898683` |
| `--color-green-500` | `#006838` |
| `--color-green-350` | `#4aa45c` |
| `--color-white` | `#fff` |
| `--color-gray-400` | `#625e5b` |
| `--color-blue-400` | `#8bbff5` |
| `--color-gray-100` | `#f6f5f3` |
| `--color-red-800` | `#c72d06` |
| `--color-red` | `#e94e2a` |
| `--color-blue-100` | `#f3f9fe` |

_…and 108 more measured on the page._

Prefer these names when extending their system — it's the brand's actual vocabulary.

## Layout (measured)
- container max 1160px · common grid: 12-col
- nav: 0px sticky

| Section (y) | Height | Cols | Gap | Pad y | Split |
|---|---|---|---|---|---|
| 810 | 864 | 12 | 16 | 32/0 | — |
| 1674 | 1322 | 12 | 16 | 80/80 | — |
| 2996 | 496 | 12 | 16 | 80/80 | — |
| 3572 | 1149 | — | — | 0/0 | — |
| 4721 | 1018 | 12 | 16 | 80/80 | — |

## Motion choreography (measured)
Load order: `div.otFloatingRoundedCorner` @0ms
- scroll reveal: 5 elements rest at opacity 0, animate in over 300ms (1 revealed during the drive).
- overlay dialog (auto-opened): panel #FFFFFF · r 16px · shadow 

Rebuild the timeline, not just the durations — order, delays and staggers above are the choreography.

## Components (measured)
- link: #302E2D · no underline — hover #006838
- disabled: bg #FFFFFF · text #C1BCB7

## Responsive (measured)
- breakpoints: 426px · 550px · 600px · 640px · 768px · 896px
- mobile (390px): hero 32px · body 16px · nav: inline

## How to apply
Paste the Tailwind `@theme` (or CSS variables) as your base, then build each
section to its spec — verify every color, radius, and font against these tokens.
Hover/focus states, shadows and motion timings above are measured from the live page — match them exactly, don't re-guess them.

← All decoded design systems

An automated reading of Sierra's publicly-visible CSS (colors, fonts, spacing, motion) — not affiliated with sierra.ai. No screenshots stored. Removal requests: hello@mozaika.design.