# UEFA gradient

Gradients derived from UEFA'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/uefa-com
- Brand colors: https://brandsweets.com/colors/brands/uefa-com · Brand page: https://brandsweets.com/b/uefa-com
- Palette: primary #00d9f7, secondary #1a313c, accents #1e4fd0
- Source: https://uefa.com (extracted 2026-09-05)

## Brand gradient

- CSS: `linear-gradient(135deg in oklab, #00d9f7 0%, #1a313c 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#00d9f7] to-[#1a313c]`
- Contrast (worst point): white 1.71:1 fail · black 1.55:1 fail · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.00d9f7-1a313c?a=135

## Hero background

Chroma ×0.35 so it can carry text; ink white (inkFor at the midpoint). L shifted −0.26 until the ink passes AA at the worst point (4.55:1).

- CSS: `linear-gradient(135deg in oklab, #4f7d87 0%, #010101 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#4f7d87] to-[#010101]`
- Contrast (worst point): white 4.55:1 AA · black 1.01:1 fail · banding medium · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.4f7d87-010101?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. Black ink passes AA on the surface and both states (worst 9.79:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #2ee6ff 0%, #00ccea 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#2ee6ff] to-[#00ccea]`
- Contrast (worst point): white 1.51:1 fail · black 10.82:1 AA · banding high · ink #000000
- Maker: https://brandsweets.com/gradients/new/v1.2ee6ff-00ccea?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #4cf0ff 0%, #00d6f4 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #12dcfa 0%, #00c2e0 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #cfffff 0%, #00d9f7 50%, #009db8 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#cfffff] via-[#00d9f7] to-[#009db8]`
- Contrast (worst point): white 1.08:1 fail · black 6.51:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.cfffff-00d9f7-009db8?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, #00d9f7 0%, #00e0c9 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#00d9f7] to-[#00e0c9]`
- Contrast (worst point): white 1.67:1 fail · black 12.23:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.00d9f7-00e0c9?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, #00d9f7 0%, #ffa896 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#00d9f7] to-[#ffa896]`
- Contrast (worst point): white 1.68:1 fail · black 11.27:1 AA · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.00d9f7-ffa896?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, #00d9f7 0%, #ff97f0 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#00d9f7] to-[#ff97f0]`
- Contrast (worst point): white 1.71:1 fail · black 10.93:1 AA · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.00d9f7-ff97f0?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 1.71:1, black 1.55:1 */
  --brand-gradient: linear-gradient(135deg in oklab, #00d9f7 0%, #1a313c 100%);
  /* hero — worst-case contrast: white 4.55:1 AA, black 1.01:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklab, #4f7d87 0%, #010101 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 1.51:1, black 10.82:1 AA */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #2ee6ff 0%, #00ccea 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #4cf0ff 0%, #00d6f4 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #12dcfa 0%, #00c2e0 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.