# League of Legends gradient

Gradients derived from League of Legends'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/leagueoflegends-com
- Brand colors: https://brandsweets.com/colors/brands/leagueoflegends-com · Brand page: https://brandsweets.com/b/leagueoflegends-com
- Palette: primary #0a1428, secondary #0000ee, accents #c8aa6e
- Source: https://leagueoflegends.com (extracted 2026-09-02)

## Brand gradient

- CSS: `linear-gradient(135deg in oklab, #0a1428 0%, #0000ee 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#0a1428] to-[#0000ee]`
- Contrast (worst point): white 9.40:1 AA · black 1.14:1 fail · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.0a1428-0000ee?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 (8.23:1) without adjusting L.

- CSS: `linear-gradient(135deg in oklab, #11151c 0%, #324d88 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#11151c] to-[#324d88]`
- Contrast (worst point): white 8.23:1 AA · black 1.15:1 fail · banding medium · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.11151c-324d88?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 15.33:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #131d32 0%, #040b1e 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#131d32] to-[#040b1e]`
- Contrast (worst point): white 16.81:1 AA · black 1.07:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.131d32-040b1e?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #1a253a 0%, #081225 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #0c162b 0%, #010517 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #354158 0%, #0a1428 50%, #000006 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#354158] via-[#0a1428] to-[#000006]`
- Contrast (worst point): white 10.25:1 AA · black 1.00:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.354158-0a1428-000006?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, #0a1428 0%, #0c161b 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#0a1428] to-[#0c161b]`
- Contrast (worst point): white 18.27:1 AA · black 1.14:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.0a1428-0c161b?a=135

## Complementary

Partner hue from the complementary rule at the source colour's lightness. ΔH 179° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

- CSS: `linear-gradient(135deg in oklch shorter hue, #0a1428 0%, #19140b 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#0a1428] to-[#19140b]`
- Contrast (worst point): white 18.28:1 AA · black 1.14:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.0a1428-19140b?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, #0a1428 0%, #220e0d 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#0a1428] to-[#220e0d]`
- Contrast (worst point): white 18.32:1 AA · black 1.13:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.0a1428-220e0d?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 9.40:1 AA, black 1.14:1 */
  --brand-gradient: linear-gradient(135deg in oklab, #0a1428 0%, #0000ee 100%);
  /* hero — worst-case contrast: white 8.23:1 AA, black 1.15:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklab, #11151c 0%, #324d88 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 16.81:1 AA, black 1.07:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #131d32 0%, #040b1e 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #1a253a 0%, #081225 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #0c162b 0%, #010517 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.