# #a21710

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

## Values

- Hex: `#a21710`
- RGB: rgb(162, 23, 16)
- HSL: hsl(3, 82%, 35%)
- OKLCH: oklch(0.458 0.173 29.1)
- Relative luminance: 0.0833
- Nearest named color: Bleeding Crimson (#9b1414, Δ 1.656) — https://brandsweets.com/colors/bleeding-crimson
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/a21710

## Tints & shades

- Tints (toward white): #be1b13, #df2016, #ea332a, #ed4e45, #f06d66, #f38782, #f5a29e, #f8bdb9, #fbdcda, #fef6f6
- Shades (toward black): #95150f, #87130d, #79110c, #6b0f0b, #5d0d09, #4a0b07, #3c0906, #2e0705, #200503, #130302

## Harmonies

- Complementary: #109ba2
- Analogous: #a21052, #a26110
- Triadic: #10a217, #1710a2
- Split-complementary: #10a261, #1052a2
- Tetradic: #52a210, #109ba2, #6110a2

## Colors that go with #a21710

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

- **Royal Blue** #4169e1 [harmony, pool: triadic] — Royal Blue completes a triad with #a21710 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Bose (https://brandsweets.com/colors/brands/bose-com), Behance (https://brandsweets.com/colors/brands/behance-net), Chase (https://brandsweets.com/colors/brands/chase-com), Coinbase (https://brandsweets.com/colors/brands/coinbase). — https://brandsweets.com/colors/royalblue
- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite #a21710 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Saffron (https://brandsweets.com/palettes/warm#saffron), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre). — https://brandsweets.com/colors/teal
- **Crimson** #dc143c [pool] — Crimson is paired with #a21710 in 6 real palettes, including State Farm's brand system and Wendy's's brand system, as the lead colour. Seen in: State Farm (https://brandsweets.com/colors/brands/statefarm-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com), Vodafone (https://brandsweets.com/colors/brands/vodafone-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/crimson
- **Dark Olive Green** #556b2f [pool] — Dark Olive Green shows up next to #a21710 in 4 real palettes, including Cider and Olive Grove, as the accent. Seen in: Cider (https://brandsweets.com/palettes/warm#cider), 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). — https://brandsweets.com/colors/darkolivegreen
- **Denim** #1560bd [pool] — Designers have shipped Denim with #a21710: 7 real palettes, including State Farm's brand system and Campbell's's brand system, as the accent. Seen in: State Farm (https://brandsweets.com/colors/brands/statefarm-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), Nissan (https://brandsweets.com/colors/brands/nissanusa-com), AT&T (https://brandsweets.com/colors/brands/att-com). — https://brandsweets.com/colors/denim
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #a21710 in 4 real palettes, including Fireside and Noir Beauty, as the accent. Seen in: Fireside (https://brandsweets.com/palettes/dark#fireside), Noir Beauty (https://brandsweets.com/palettes/dark#noir-beauty), Harvest (https://brandsweets.com/palettes/warm#harvest), Candlelight (https://brandsweets.com/palettes/warm#candlelight). — https://brandsweets.com/colors/goldenrod
- **Hunter Green** #355e3b [pool] — Hunter Green is paired with #a21710 in 4 real palettes, including Fireside and Bookshop, as the supporting colour. Seen in: Fireside (https://brandsweets.com/palettes/dark#fireside), Bookshop (https://brandsweets.com/palettes/editorial#bookshop), Trailhead (https://brandsweets.com/palettes/warm#trailhead), Darkroom (https://brandsweets.com/palettes/muted#darkroom). — https://brandsweets.com/colors/hunter-green
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #a21710: 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): 7.88:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.67:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #e82117 (4.66:1); AA: background → #c4c4c4 (4.52:1); AAA: text → #f06d66 (7.08:1); AAA: background → #f2f2f2 (7.04:1)

## Brands using this color

- **State Farm** — secondary #a11b13 (Δ 0.368) — https://brandsweets.com/colors/brands/statefarm-com

## 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/a21710-c4a39c-62cb9d-2d261f-f1e9ed?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: "#a21710" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.