# Chase gradient

Gradients derived from Chase'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/chase-com
- Brand colors: https://brandsweets.com/colors/brands/chase-com · Brand page: https://brandsweets.com/b/chase-com
- Palette: primary #045cbb, secondary #0060f0, accents #bf2155
- Source: https://chase.com (extracted 2026-09-02)

## Brand gradient

ΔE_OK 0.083 < 0.15 between #045cbb and #0060f0 — a 2-stop would read as a flat fill, so this is a tonal ramp of #045cbb.

- CSS: `linear-gradient(135deg in oklch shorter hue, #4994f8 0%, #045cbb 50%, #00257d 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#4994f8] via-[#045cbb] to-[#00257d]`
- Contrast (worst point): white 3.06:1 AA-large · black 1.56:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.4994f8-045cbb-00257d?a=135&in=oklch&hue=shorter

## Hero background

Chroma ×0.35 so it can carry text; ink white (inkFor at the midpoint). L shifted −0.10 until the ink passes AA at the worst point (4.53:1).

- CSS: `linear-gradient(135deg in oklch shorter hue, #5f789a 0%, #2c4363 50%, #0f1a2f 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#5f789a] via-[#2c4363] to-[#0f1a2f]`
- Contrast (worst point): white 4.53:1 AA · black 1.21:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.5f789a-2c4363-0f1a2f?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 4.75:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #1968c8 0%, #0050ae 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#1968c8] to-[#0050ae]`
- Contrast (worst point): white 5.45:1 AA · black 2.76:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.1968c8-0050ae?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #2472d3 0%, #0059b8 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #0a5fbe 0%, #0047a4 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #4994f8 0%, #045cbb 50%, #00257d 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#4994f8] via-[#045cbb] to-[#00257d]`
- Contrast (worst point): white 3.06:1 AA-large · black 1.56:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.4994f8-045cbb-00257d?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, #045cbb 0%, #056a88 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#045cbb] to-[#056a88]`
- Contrast (worst point): white 6.12:1 AA · black 3.24:1 AA-large · banding high
- Maker: https://brandsweets.com/gradients/new/v1.045cbb-056a88?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, #045cbb 0%, #805704 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#045cbb] to-[#805704]`
- Contrast (worst point): white 5.69:1 AA · black 3.25:1 AA-large · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.045cbb-805704?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, #045cbb 0%, #b20637 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#045cbb] to-[#b20637]`
- Contrast (worst point): white 6.43:1 AA · black 2.97:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.045cbb-b20637?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 3.06:1 AA-large, black 1.56:1 */
  --brand-gradient: linear-gradient(135deg in oklch shorter hue, #4994f8 0%, #045cbb 50%, #00257d 100%);
  /* hero — worst-case contrast: white 4.53:1 AA, black 1.21:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklch shorter hue, #5f789a 0%, #2c4363 50%, #0f1a2f 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 5.45:1 AA, black 2.76:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #1968c8 0%, #0050ae 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #2472d3 0%, #0059b8 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #0a5fbe 0%, #0047a4 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.