# Opensea gradient

Gradients derived from Opensea'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/opensea-io
- Brand colors: https://brandsweets.com/colors/brands/opensea-io · Brand page: https://brandsweets.com/b/opensea-io
- Palette: primary #0484fc, secondary #7cc4fc, accents #cd7f32
- Source: https://opensea.io (extracted 2026-09-02)

## Brand gradient

- CSS: `linear-gradient(135deg in oklab, #0484fc 0%, #7cc4fc 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#0484fc] to-[#7cc4fc]`
- Contrast (worst point): white 1.88:1 fail · black 5.71:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.0484fc-7cc4fc?a=135

## Hero background

Chroma ×0.35 so it can carry text; ink black (inkFor at the midpoint). Passes AA for that ink at the worst point (5.83:1) without adjusting L.

- CSS: `linear-gradient(135deg in oklab, #6a89b1 0%, #a8bfd3 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#6a89b1] to-[#a8bfd3]`
- Contrast (worst point): white 1.90:1 fail · black 5.83:1 AA · banding high · ink #000000
- Maker: https://brandsweets.com/gradients/new/v1.6a89b1-a8bfd3?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. L shifted −0.10 so white ink gets as close as the ±0.1 bound allows to AA on the surface and both states (worst 4.16:1). Ink is below AA (4.16:1 at the worst point) — use it for large text only, or pick a darker/lighter primary for buttons.

- CSS: `linear-gradient(180deg in oklch shorter hue, #0071e7 0%, #0057cb 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#0071e7] to-[#0057cb]`
- Contrast (worst point): white 4.65:1 AA · black 3.23:1 AA-large · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.0071e7-0057cb?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #007af1 0%, #0061d6 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #0067dd 0%, #004fbd 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #86c2ff 0%, #0484fc 50%, #004cb8 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#86c2ff] via-[#0484fc] to-[#004cb8]`
- Contrast (worst point): white 1.88:1 fail · black 2.73:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.86c2ff-0484fc-004cb8?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, #0484fc 0%, #0595bb 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#0484fc] to-[#0595bb]`
- Contrast (worst point): white 3.48:1 AA-large · black 5.70:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.0484fc-0595bb?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, #0484fc 0%, #b47904 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#0484fc] to-[#b47904]`
- Contrast (worst point): white 3.68:1 AA-large · black 5.29:1 AA · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.0484fc-b47904?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, #0484fc 0%, #f70655 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#0484fc] to-[#f70655]`
- Contrast (worst point): white 3.66:1 AA-large · black 5.10:1 AA · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.0484fc-f70655?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 1.88:1, black 5.71:1 AA */
  --brand-gradient: linear-gradient(135deg in oklab, #0484fc 0%, #7cc4fc 100%);
  /* hero — worst-case contrast: white 1.90:1, black 5.83:1 AA; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklab, #6a89b1 0%, #a8bfd3 100%);
  --brand-gradient-hero-ink: #000000;
  /* button — worst-case contrast: white 4.65:1 AA, black 3.23:1 AA-large */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #0071e7 0%, #0057cb 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #007af1 0%, #0061d6 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #0067dd 0%, #004fbd 100%);
  --brand-gradient-button-ink: #ffffff;
  /* button ink: 4.2:1 — below AA */
}
```

## 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.