# sienna (#a0522d)

A CSS color — warm. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#a0522d`
- RGB: rgb(160, 82, 45)
- HSL: hsl(19, 56%, 40%)
- OKLCH: oklch(0.526 0.115 44.6)
- Relative luminance: 0.137
- Name: sienna (`sienna`, source: css)
- Moods: warm
- Page: https://brandsweets.com/colors/sienna

## Tints & shades

- Tints (toward white): #b75d34, #c96b40, #cf7b54, #d58d6c, #dca084, #e3b29c, #eac5b3, #efd4c7, #f6e6df, #fdf9f7
- Shades (toward black): #8f4928, #834325, #733b21, #67351d, #582d19, #482414, #3c1e11, #2c160c, #201009, #100804

## Harmonies

- Complementary: #2d7b9f
- Analogous: #9f2d42, #9f8a2d
- Triadic: #2d9f51, #512d9f
- Split-complementary: #2d9f8a, #2d429f
- Tetradic: #429f2d, #2d7b9f, #8a2d9f

## Colors that go with sienna

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Crimson** #dc143c [harmony, pool: analogous] — Crimson is sienna's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Wendy's (https://brandsweets.com/colors/brands/wendys-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Vodafone (https://brandsweets.com/colors/brands/vodafone-com), Huawei (https://brandsweets.com/colors/brands/huawei-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [harmony, pool: split] — Denim is a split-complement of sienna: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Dyson (https://brandsweets.com/colors/brands/dyson-com), Etsy (https://brandsweets.com/colors/brands/etsy-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com). — https://brandsweets.com/colors/denim
- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite sienna on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), Saffron (https://brandsweets.com/palettes/warm#saffron). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with sienna in 4 real palettes, including Ember and Trailhead, as the accent. Seen in: Ember (https://brandsweets.com/palettes/bold#ember), Trailhead (https://brandsweets.com/palettes/warm#trailhead), Maple (https://brandsweets.com/palettes/warm#maple), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Champagne** #f7e7ce [pool] — 5 real palettes, including BrandSweets's brand system and Woodsmoke put Champagne beside sienna. Seen in: BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), Coffee Bar (https://brandsweets.com/palettes/dark#coffee-bar), Bramble (https://brandsweets.com/palettes/muted#bramble). — https://brandsweets.com/colors/champagne
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to sienna in 6 real palettes, including BrandSweets's brand system and Olive Grove. Seen in: BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen). — https://brandsweets.com/colors/darkolivegreen
- **Hunter Green** #355e3b [pool] — Hunter Green is paired with sienna in 6 real palettes, including Fireside and Trailhead, as the supporting colour. Seen in: Fireside (https://brandsweets.com/palettes/dark#fireside), Trailhead (https://brandsweets.com/palettes/warm#trailhead), Darkroom (https://brandsweets.com/palettes/muted#darkroom), Bookshop (https://brandsweets.com/palettes/editorial#bookshop). — https://brandsweets.com/colors/hunter-green
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for sienna: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: IHG (https://brandsweets.com/colors/brands/ihg-com). — https://brandsweets.com/colors/charcoal

## Contrast (WCAG 2.x, as text)

- On white (#ffffff): 5.62:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #874526 (7.22:1)
- On black (#000000): 3.74:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #b75d34 (4.63:1); AA: background → #e8e8e8 (4.58:1); AAA: text → #d1815c (7.01:1)

## Brands using this color

- **BrandSweets** — primary #a4501c (Δ 1.438) — https://brandsweets.com/colors/brands/brandsweets

## Fonts for this mood

- warm: https://brandsweets.com/fonts/mood/warm

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/a0522d-c4ad9c-62cbb9-2d2a1f-f1e9eb?lock=0&style=vibrant
(Humans lock/regenerate in the tool; the URL is the state — read `lock=` back to see what they kept.)

## Connect an agent

Point any MCP client at the BrandSweets colors endpoint for the same engine:

- Endpoint: https://mcp.brandsweets.com/colors/mcp
- Tools: `analyze_color` (e.g. `analyze_color({ color: "#a0522d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.