# Visa gradient

Gradients derived from Visa'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/visa-com
- Brand colors: https://brandsweets.com/colors/brands/visa-com · Brand page: https://brandsweets.com/b/visa-com
- Palette: primary #1a1e73, secondary #1a1f72
- Source: https://visa.com (extracted 2026-09-05)

## Brand gradient

ΔE_OK 0.003 < 0.15 between #1a1e73 and #1a1f72 — a 2-stop would read as a flat fill, so this is a tonal ramp of #1a1e73.

- CSS: `linear-gradient(135deg in oklch shorter hue, #4354ac 0%, #1a1e73 50%, #03002c 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#4354ac] via-[#1a1e73] to-[#03002c]`
- Contrast (worst point): white 6.77:1 AA · black 1.04:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.4354ac-1a1e73-03002c?a=135&in=oklch&hue=shorter

## 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 (6.58:1) without adjusting L.

- CSS: `linear-gradient(135deg in oklch shorter hue, #545c7a 0%, #252c47 50%, #050815 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#545c7a] via-[#252c47] to-[#050815]`
- Contrast (worst point): white 6.58:1 AA · black 1.05:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.545c7a-252c47-050815?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. White ink passes AA on the surface and both states (worst 10.89:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #222a80 0%, #131067 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#222a80] to-[#131067]`
- Contrast (worst point): white 12.27:1 AA · black 1.30:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.222a80-131067?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #293389 0%, #181b70 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #1c2176 0%, #0f045d 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #4354ac 0%, #1a1e73 50%, #03002c 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#4354ac] via-[#1a1e73] to-[#03002c]`
- Contrast (worst point): white 6.77:1 AA · black 1.04:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.4354ac-1a1e73-03002c?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, #1a1e73 0%, #133146 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#1a1e73] to-[#133146]`
- Contrast (worst point): white 13.46:1 AA · black 1.47:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.1a1e73-133146?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, #1a1e73 0%, #362d11 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#1a1e73] to-[#362d11]`
- Contrast (worst point): white 13.59:1 AA · black 1.46:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.1a1e73-362d11?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, #1a1e73 0%, #501a10 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#1a1e73] to-[#501a10]`
- Contrast (worst point): white 13.84:1 AA · black 1.47:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.1a1e73-501a10?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 6.77:1 AA, black 1.04:1 */
  --brand-gradient: linear-gradient(135deg in oklch shorter hue, #4354ac 0%, #1a1e73 50%, #03002c 100%);
  /* hero — worst-case contrast: white 6.58:1 AA, black 1.05:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklch shorter hue, #545c7a 0%, #252c47 50%, #050815 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 12.27:1 AA, black 1.30:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #222a80 0%, #131067 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #293389 0%, #181b70 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #1c2176 0%, #0f045d 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.