# Fitbit gradient

Gradients derived from Fitbit's published colour tokens (nominative use; no brand assets). Deterministic: the same values are served as `--brand-gradient*` in the brand's brand.css.

- Page: https://brandsweets.com/gradients/brands/fitbit-com
- Brand colors: https://brandsweets.com/colors/brands/fitbit-com · Brand page: https://brandsweets.com/b/fitbit-com
- Palette: primary #191c1d, secondary #1967d2, accents #edcdca
- Source: https://fitbit.com (extracted 2026-09-02)

## Brand gradient

- CSS: `linear-gradient(135deg in oklab, #191c1d 0%, #1967d2 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#191c1d] to-[#1967d2]`
- Contrast (worst point): white 5.37:1 AA · black 1.23:1 fail · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.191c1d-1967d2?a=135

## Hero background

Chroma ×0.35 so it can carry text; ink white (inkFor at the midpoint). Passes AA for that ink at the worst point (5.26:1) without adjusting L.

- CSS: `linear-gradient(135deg in oklab, #1b1c1c 0%, #566d91 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#1b1c1c] to-[#566d91]`
- Contrast (worst point): white 5.26:1 AA · black 1.23:1 fail · banding medium · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.1b1c1c-566d91?a=135

## Button / CTA

ΔL 0.08 top→bottom in the primary's hue (a lit surface, not a rainbow); hover L +0.03, active L −0.03. White ink passes AA on the surface and both states (worst 13.88:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #222527 0%, #101314 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#222527] to-[#101314]`
- Contrast (worst point): white 15.42:1 AA · black 1.13:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.222527-101314?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #2a2d2e 0%, #171a1b 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #1b1e1f 0%, #0a0c0d 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #46494a 0%, #191c1d 50%, #000001 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#46494a] via-[#191c1d] to-[#000001]`
- Contrast (worst point): white 9.08:1 AA · black 1.00:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.46494a-191c1d-000001?a=135&in=oklch&hue=shorter

## Analogous

Partner hue from the analogous rule at the source colour's lightness.

- CSS: `linear-gradient(135deg in oklab, #191c1d 0%, #191c1c 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#191c1d] to-[#191c1c]`
- Contrast (worst point): white 17.14:1 AA · black 1.22:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.191c1d-191c1c?a=135

## Complementary

Partner hue from the complementary rule at the source colour's lightness. ΔH 177° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

- CSS: `linear-gradient(135deg in oklch shorter hue, #191c1d 0%, #1f1a18 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#191c1d] to-[#1f1a18]`
- Contrast (worst point): white 17.09:1 AA · black 1.22:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.191c1d-1f1a18?a=135&in=oklch&hue=shorter

## Triadic

Partner hue from the triadic rule at the source colour's lightness.

- CSS: `linear-gradient(135deg in oklab, #191c1d 0%, #1f191d 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#191c1d] to-[#1f191d]`
- Contrast (worst point): white 17.10:1 AA · black 1.21:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.191c1d-1f191d?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 5.37:1 AA, black 1.23:1 */
  --brand-gradient: linear-gradient(135deg in oklab, #191c1d 0%, #1967d2 100%);
  /* hero — worst-case contrast: white 5.26:1 AA, black 1.23:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklab, #1b1c1c 0%, #566d91 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 15.42:1 AA, black 1.13:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #222527 0%, #101314 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #2a2d2e 0%, #171a1b 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #1b1e1f 0%, #0a0c0d 100%);
  --brand-gradient-button-ink: #ffffff;
}
```

## Gradient maker

Every maker URL is the gradient's state: `/gradients/new/v1.<hex>-<hex>[_pos]?a=135&in=oklch&hue=shorter&e=soft&g=8`. Hand one to a human, let them refine, and read the link they return.

## Connect an agent

Point any MCP client at the BrandSweets gradients endpoint for the same engine and corpus:

- Endpoint: https://mcp.brandsweets.com/gradients/mcp
- Tools: `make_gradient` (2–5 colours → CSS with the interpolation space, Tailwind v4, SVG, PNG URL, DTCG token + the contrast/banding/gamut report), `brand_gradients` (brand slug or palette → brand gradient, hero, button, variants).
- Resource: `gradients://corpus` — the whole bundled corpus as JSON.