# Southwest Airlines gradient

Gradients derived from Southwest Airlines'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/southwest-com
- Brand colors: https://brandsweets.com/colors/brands/southwest-com · Brand page: https://brandsweets.com/b/southwest-com
- Palette: primary #090f23, secondary #111b40, accents #ffbf27
- Source: https://southwest.com (extracted 2026-09-05)

## Brand gradient

ΔE_OK 0.069 < 0.15 between #090f23 and #111b40 — a 2-stop would read as a flat fill, so this is a tonal ramp of #090f23.

- CSS: `linear-gradient(135deg in oklch shorter hue, #333b52 0%, #090f23 50%, #000006 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#333b52] via-[#090f23] to-[#000006]`
- Contrast (worst point): white 11.12:1 AA · black 1.00:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.333b52-090f23-000006?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 (11.03:1) without adjusting L.

- CSS: `linear-gradient(135deg in oklch shorter hue, #393c44 0%, #0e1017 50%, #000102 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#393c44] via-[#0e1017] to-[#000102]`
- Contrast (worst point): white 11.03:1 AA · black 1.00:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.393c44-0e1017-000102?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 16.33:1).

- CSS: `linear-gradient(180deg in oklch shorter hue, #11182d 0%, #030719 100%)`
- Tailwind: `bg-linear-to-b/oklch from-[#11182d] to-[#030719]`
- Contrast (worst point): white 17.61:1 AA · black 1.05:1 fail · banding high · ink #ffffff
- Maker: https://brandsweets.com/gradients/new/v1.11182d-030719?a=180&in=oklch&hue=shorter
- Hover: `linear-gradient(180deg in oklch shorter hue, #181f35 0%, #070d21 100%)`
- Active: `linear-gradient(180deg in oklch shorter hue, #0b1125 0%, #010312 100%)`

## Tonal ramp

- CSS: `linear-gradient(135deg in oklch shorter hue, #333b52 0%, #090f23 50%, #000006 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#333b52] via-[#090f23] to-[#000006]`
- Contrast (worst point): white 11.12:1 AA · black 1.00:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.333b52-090f23-000006?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, #090f23 0%, #0b1116 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#090f23] to-[#0b1116]`
- Contrast (worst point): white 18.95:1 AA · black 1.10:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.090f23-0b1116?a=135

## Complementary

Partner hue from the complementary rule at the source colour's lightness. ΔH 175° > 140° — interpolating in oklch (shorter hue) keeps the midpoint saturated.

- CSS: `linear-gradient(135deg in oklch shorter hue, #090f23 0%, #13100a 100%)`
- Tailwind: `bg-linear-to-br/oklch from-[#090f23] to-[#13100a]`
- Contrast (worst point): white 18.95:1 AA · black 1.10:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.090f23-13100a?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, #090f23 0%, #1b0c0a 100%)`
- Tailwind: `bg-linear-to-br/oklab from-[#090f23] to-[#1b0c0a]`
- Contrast (worst point): white 18.95:1 AA · black 1.10:1 fail · banding high
- Maker: https://brandsweets.com/gradients/new/v1.090f23-1b0c0a?a=135

## CSS custom properties (brand.css)

```css
:root {
  /* Brand gradient (derived) */
  /* worst-case contrast: white 11.12:1 AA, black 1.00:1 */
  --brand-gradient: linear-gradient(135deg in oklch shorter hue, #333b52 0%, #090f23 50%, #000006 100%);
  /* hero — worst-case contrast: white 11.03:1 AA, black 1.00:1; ink passes AA at the worst point */
  --brand-gradient-hero: linear-gradient(135deg in oklch shorter hue, #393c44 0%, #0e1017 50%, #000102 100%);
  --brand-gradient-hero-ink: #ffffff;
  /* button — worst-case contrast: white 17.61:1 AA, black 1.05:1 */
  --brand-gradient-button: linear-gradient(180deg in oklch shorter hue, #11182d 0%, #030719 100%);
  --brand-gradient-button-hover: linear-gradient(180deg in oklch shorter hue, #181f35 0%, #070d21 100%);
  --brand-gradient-button-active: linear-gradient(180deg in oklch shorter hue, #0b1125 0%, #010312 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.