# Guinness gradient

Gradients derived from Guinness'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/guinness-com
- Brand colors: https://brandsweets.com/colors/brands/guinness-com · Brand page: https://brandsweets.com/b/guinness-com
- Palette: primary #b9965b, secondary #1a73e8, accents #3860be
- Source: https://guinness.com (extracted 2026-09-02)

## Brand gradient

ΔH 178° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

- CSS: `linear-gradient(135deg in oklch shorter hue, #b9965b 0%, #1a73e8 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#b9965b] to-[#1a73e8]`
- Contrast (worst point): white 2.77:1 fail · black 4.66:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.b9965b-1a73e8?a=135&in=oklch&hue=shorter

## Hero background

Chroma ×0.35 so it can carry text; ink white (inkFor at the midpoint). L shifted −0.13 until the ink passes AA at the worst point (4.64:1).

- CSS: `linear-gradient(135deg in oklch shorter hue, #7f7360 0%, #38537a 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#7f7360] to-[#38537a]`
- Contrast (worst point): white 4.64:1 AA · black 2.68:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.7f7360-38537a?a=135&in=oklch&hue=shorter

## 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. Black ink passes AA on the surface and both states (worst 5.79:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #c6a267 0%, #ac8a4f 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#c6a267] to-[#ac8a4f]`
- Contrast (worst point): white 2.40:1 fail · black 6.50:1 AA · banding high · ink #000000
- Maker: https://brandsweets.com/gradients/new/v1.c6a267-ac8a4f?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #d0ac70 0%, #b69358 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #bc995e 0%, #a38146 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #f4cf93 0%, #b9965b 50%, #816024 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#f4cf93] via-[#b9965b] to-[#816024]`
- Contrast (worst point): white 1.48:1 fail · black 3.63:1 AA-large · banding high
- Maker: https://brandsweets.com/gradients/new/v1.f4cf93-b9965b-816024?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, #b9965b 0%, #d4865a 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#b9965b] to-[#d4865a]`
- Contrast (worst point): white 2.76:1 fail · black 7.35:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.b9965b-d4865a?a=135

## Complementary

Partner hue from the complementary rule at the source colour's lightness. ΔH 180° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

- CSS: `linear-gradient(135deg in oklch shorter hue, #b9965b 0%, #779dd9 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#b9965b] to-[#779dd9]`
- Contrast (worst point): white 2.62:1 fail · black 7.55:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.b9965b-779dd9?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, #b9965b 0%, #63aaad 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#b9965b] to-[#63aaad]`
- Contrast (worst point): white 2.65:1 fail · black 7.55:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.b9965b-63aaad?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 2.77:1, black 4.66:1 AA */
  --brand-gradient: linear-gradient(135deg in oklch shorter hue, #b9965b 0%, #1a73e8 100%);
  /* hero — worst-case contrast: white 4.64:1 AA, black 2.68:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklch shorter hue, #7f7360 0%, #38537a 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 2.40:1, black 6.50:1 AA */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #c6a267 0%, #ac8a4f 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #d0ac70 0%, #b69358 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #bc995e 0%, #a38146 100%);
  --brand-gradient-button-ink: #000000;
}
```

## 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.