# #ac421b

A color — warm, vivid, playful, bold. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#ac421b`
- RGB: rgb(172, 66, 27)
- HSL: hsl(16, 73%, 39%)
- OKLCH: oklch(0.519 0.148 39)
- Relative luminance: 0.1275
- Nearest named color: Rust (#b7410e, Δ 2.18) — https://brandsweets.com/colors/rust
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/ac421b

## Tints & shades

- Tints (toward white): #c74c1f, #dd5727, #e16c41, #e6815c, #ea9576, #eda68c, #f1bba7, #f5cfc1, #f9e4dc, #fef8f6
- Shades (toward black): #9f3d19, #8d3616, #803114, #6e2a11, #61250f, #4f1e0c, #42190a, #311208, #230d06, #120703

## Harmonies

- Complementary: #1b85ac
- Analogous: #ac1b3d, #ac8a1b
- Triadic: #1bac42, #421bac
- Split-complementary: #1bac8a, #1b3dac
- Tetradic: #3dac1b, #1b85ac, #8a1bac

## Colors that go with #ac421b

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 #ac421b'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), Vodafone (https://brandsweets.com/colors/brands/vodafone-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Huawei (https://brandsweets.com/colors/brands/huawei-com). — https://brandsweets.com/colors/crimson
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #ac421b — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Coinbase (https://brandsweets.com/colors/brands/coinbase), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Wellness (https://brandsweets.com/palettes/warm#wellness), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/seagreen
- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite #ac421b 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), Redfin (https://brandsweets.com/colors/brands/redfin-com), Saffron (https://brandsweets.com/palettes/warm#saffron). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #ac421b 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 Woodsmoke and BrandSweets's brand system put Champagne beside #ac421b, as the text colour against it. Seen in: Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Darkroom (https://brandsweets.com/palettes/muted#darkroom), Bramble (https://brandsweets.com/palettes/muted#bramble). — https://brandsweets.com/colors/champagne
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #ac421b: 4 real palettes, including Behance's brand system and MLB's brand system, as the supporting colour. Seen in: Behance (https://brandsweets.com/colors/brands/behance-net), MLB (https://brandsweets.com/colors/brands/mlb-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Reebok (https://brandsweets.com/colors/brands/reebok-com). — https://brandsweets.com/colors/cobalt
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #ac421b in 6 real palettes, including Olive Grove and BrandSweets's brand system, as the lead colour. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), Cider (https://brandsweets.com/palettes/warm#cider). — https://brandsweets.com/colors/darkolivegreen
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #ac421b: 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), Codecademy (https://brandsweets.com/colors/brands/codecademy-com). — https://brandsweets.com/colors/charcoal

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

- On white (#ffffff): 5.92:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #963917 (7.26:1)
- On black (#000000): 3.55:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #cb4d20 (4.62:1); AA: background → #e3e3e3 (4.61:1); AAA: text → #e47a53 (7.21:1)

## Curated palettes containing it

- **Harvest** (autumn, warm, muted) — #b5451b, #8a6a2f, #d99a2b, #f8f1e4, #2b1c12 — Pumpkin, straw and burnt gold on parchment — the autumn palette that still feels like a product, not a place-mat. — tool: https://brandsweets.com/palettes/new/b5451b-8a6a2f-d99a2b-f8f1e4-2b1c12 — collection: https://brandsweets.com/palettes/autumn

## Fonts for this mood

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

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/ac421b-c4ab9c-62cbb4-2d291f-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: "#ac421b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.