# Hydrogen gradient

Hydrogen is a blue gradient from uiGradients (MIT), rendered in OKLab.

### Hydrogen

- Slug: `hydrogen` · Page: https://brandsweets.com/gradients/hydrogen
- Stops: #667db6, #0082c8, #0082c8, #667db6 · angle 90° · source uigradients
- Families: blue · Moods: cool, ocean
- CSS: `linear-gradient(90deg in oklab, #667db6 0%, #0082c8 33.33%, #0082c8 66.67%, #667db6 100%)`
- Tailwind: `bg-[linear-gradient(90deg_in_oklab,#667db6_0%,#0082c8_33.33%,#0082c8_66.67%,#667db6_100%)]`
- Contrast (worst point): white 4.05:1 AA-large · black 5.02:1 AA · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.667db6-0082c8-0082c8-667db6?a=90
- Colors: https://brandsweets.com/colors/667db6, https://brandsweets.com/colors/0082c8, https://brandsweets.com/colors/0082c8, https://brandsweets.com/colors/667db6

## The same stops in other spaces

- sRGB (the source's own look): `linear-gradient(90deg in srgb, #667db6 0%, #0082c8 33.33%, #0082c8 66.67%, #667db6 100%)`
- OKLCH shorter hue: `linear-gradient(90deg in oklch shorter hue, #667db6 0%, #0082c8 33.33%, #0082c8 66.67%, #667db6 100%)`

Family pages: https://brandsweets.com/gradients/blue

## 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.