# Obsidian gradient

Gradients derived from Obsidian'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/obsidian-md
- Brand colors: https://brandsweets.com/colors/brands/obsidian-md · Brand page: https://brandsweets.com/b/obsidian-md
- Palette: primary #ac8cfc, secondary #8a5cf5, accents #22c55e
- Source: https://obsidian.md (extracted 2026-09-02)

## Brand gradient

ΔE_OK 0.126 < 0.15 between #ac8cfc and #8a5cf5 — a 2-stop would read as a flat fill, so this is a tonal ramp of #ac8cfc.

- CSS: `linear-gradient(135deg in oklch shorter hue, #e0d3ff 0%, #ac8cfc 50%, #7755bf 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#e0d3ff] via-[#ac8cfc] to-[#7755bf]`
- Contrast (worst point): white 1.41:1 fail · black 3.84:1 AA-large · banding high
- Maker: https://brandsweets.com/gradients/new/v1.e0d3ff-ac8cfc-7755bf?a=135&in=oklch&hue=shorter

## Hero background

Chroma ×0.35 so it can carry text; ink black (inkFor at the midpoint). L shifted +0.03 until the ink passes AA at the worst point (4.60:1).

- CSS: `linear-gradient(135deg in oklch shorter hue, #e6e1f1 0%, #afa6cc 50%, #797194 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#e6e1f1] via-[#afa6cc] to-[#797194]`
- Contrast (worst point): white 1.28:1 fail · black 4.60:1 AA · banding high · ink #000000
- Maker: https://brandsweets.com/gradients/new/v1.e6e1f1-afa6cc-797194?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. Black ink passes AA on the surface and both states (worst 6.03:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #b899ff 0%, #a07fee 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#b899ff] to-[#a07fee]`
- Contrast (worst point): white 2.32:1 fail · black 6.76:1 AA · banding high · ink #000000
- Maker: https://brandsweets.com/gradients/new/v1.b899ff-a07fee?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #c1a5ff 0%, #a989f9 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #af8fff 0%, #9776e4 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #e0d3ff 0%, #ac8cfc 50%, #7755bf 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#e0d3ff] via-[#ac8cfc] to-[#7755bf]`
- Contrast (worst point): white 1.41:1 fail · black 3.84:1 AA-large · banding high
- Maker: https://brandsweets.com/gradients/new/v1.e0d3ff-ac8cfc-7755bf?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, #ac8cfc 0%, #78a0fc 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#ac8cfc] to-[#78a0fc]`
- Contrast (worst point): white 2.55:1 fail · black 7.89:1 AA · banding high
- Maker: https://brandsweets.com/gradients/new/v1.ac8cfc-78a0fc?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, #ac8cfc 0%, #a1ae18 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#ac8cfc] to-[#a1ae18]`
- Contrast (worst point): white 2.44:1 fail · black 7.69:1 AA · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.ac8cfc-a1ae18?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, #ac8cfc 0%, #f28117 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#ac8cfc] to-[#f28117]`
- Contrast (worst point): white 2.60:1 fail · black 7.88:1 AA · banding medium
- Maker: https://brandsweets.com/gradients/new/v1.ac8cfc-f28117?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 1.41:1, black 3.84:1 AA-large */
  --brand-gradient: linear-gradient(135deg in oklch shorter hue, #e0d3ff 0%, #ac8cfc 50%, #7755bf 100%);
  /* hero — worst-case contrast: white 1.28:1, black 4.60:1 AA; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklch shorter hue, #e6e1f1 0%, #afa6cc 50%, #797194 100%);
  --brand-gradient-hero-ink: #000000;
  /* button — worst-case contrast: white 2.32:1, black 6.76:1 AA */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #b899ff 0%, #a07fee 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #c1a5ff 0%, #a989f9 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #af8fff 0%, #9776e4 100%);
  --brand-gradient-button-ink: #000000;
}
```

## 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.