# WhatsApp gradient

Gradients derived from WhatsApp'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/whatsapp-com
- Brand colors: https://brandsweets.com/colors/brands/whatsapp-com · Brand page: https://brandsweets.com/b/whatsapp-com
- Palette: primary #1c1e21, secondary #103928, accents #43cd66
- Source: https://whatsapp.com (extracted 2026-09-05)

## Brand gradient

ΔE_OK 0.095 < 0.15 between #1c1e21 and #103928 — a 2-stop would read as a flat fill, so this is a tonal ramp of #1c1e21.

- CSS: `linear-gradient(135deg in oklch shorter hue, #494c4f 0%, #1c1e21 50%, #000101 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#494c4f] via-[#1c1e21] to-[#000101]`
- Contrast (worst point): white 8.64:1 AA · black 1.00:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.494c4f-1c1e21-000101?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 (8.61:1) without adjusting L.

- CSS: `linear-gradient(135deg in oklch shorter hue, #4b4c4d 0%, #1d1e1f 50%, #000101 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#4b4c4d] via-[#1d1e1f] to-[#000101]`
- Contrast (worst point): white 8.61:1 AA · black 1.00:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.4b4c4d-1d1e1f-000101?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 13.43:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #25282b 0%, #131518 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#25282b] to-[#131518]`
- Contrast (worst point): white 14.82:1 AA · black 1.15:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.25282b-131518?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #2d2f32 0%, #1a1c1f 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #1e2023 0%, #0c0e11 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #494c4f 0%, #1c1e21 50%, #000101 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#494c4f] via-[#1c1e21] to-[#000101]`
- Contrast (worst point): white 8.64:1 AA · black 1.00:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.494c4f-1c1e21-000101?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, #1c1e21 0%, #1c1e1f 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#1c1e21] to-[#1c1e1f]`
- Contrast (worst point): white 16.71:1 AA · black 1.25:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.1c1e21-1c1e1f?a=135

## Complementary

Partner hue from the complementary rule at the source colour's lightness. ΔH 174° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

- CSS: `linear-gradient(135deg in oklch shorter hue, #1c1e21 0%, #1f1e1c 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#1c1e21] to-[#1f1e1c]`
- Contrast (worst point): white 16.59:1 AA · black 1.25:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.1c1e21-1f1e1c?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, #1c1e21 0%, #211d1d 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#1c1e21] to-[#211d1d]`
- Contrast (worst point): white 16.62:1 AA · black 1.25:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.1c1e21-211d1d?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 8.64:1 AA, black 1.00:1 */
  --brand-gradient: linear-gradient(135deg in oklch shorter hue, #494c4f 0%, #1c1e21 50%, #000101 100%);
  /* hero — worst-case contrast: white 8.61:1 AA, black 1.00:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklch shorter hue, #4b4c4d 0%, #1d1e1f 50%, #000101 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 14.82:1 AA, black 1.15:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #25282b 0%, #131518 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #2d2f32 0%, #1a1c1f 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #1e2023 0%, #0c0e11 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.