# #a90f21

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

## Values

- Hex: `#a90f21`
- RGB: rgb(169, 15, 33)
- HSL: hsl(353, 84%, 36%)
- OKLCH: oklch(0.469 0.182 24)
- Relative luminance: 0.0889
- Nearest named color: Blood Rush (#aa2222, Δ 1.84) — https://brandsweets.com/colors/blood-rush
- Moods: warm, vivid, playful, bold
- Page: https://brandsweets.com/colors/a90f21

## Tints & shades

- Tints (toward white): #c51126, #e1142c, #ed2c42, #ef485c, #f26475, #f4808e, #f69ca7, #f9bdc4, #fcd9dd, #fef6f7
- Shades (toward black): #9b0d1e, #8d0c1b, #7a0b18, #6c0915, #5e0812, #50070f, #42060d, #2f0409, #210306, #130204

## Harmonies

- Complementary: #0fa997
- Analogous: #a90f6e, #a94a0f
- Triadic: #21a90f, #0f21a9
- Split-complementary: #0fa94a, #0f6ea9
- Tetradic: #6ea90f, #0fa997, #4a0fa9

## Colors that go with #a90f21

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 #a90f21 — 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), Chase (https://brandsweets.com/colors/brands/chase-com), Behance (https://brandsweets.com/colors/brands/behance-net), Coinbase (https://brandsweets.com/colors/brands/coinbase). — https://brandsweets.com/colors/royalblue
- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite #a90f21 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
- **Amber** #ffbf00 [pool] — Amber is paired with #a90f21 in 4 real palettes, including Ember and Maple, as the accent. Seen in: Ember (https://brandsweets.com/palettes/bold#ember), Maple (https://brandsweets.com/palettes/warm#maple), Trailhead (https://brandsweets.com/palettes/warm#trailhead), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Crimson** #dc143c [pool] — Crimson is paired with #a90f21 in 8 real palettes, including Wendy's's brand system and State Farm's brand system, as the lead colour. 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), 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 #a90f21 in 4 real palettes, including Olive Grove and Cider, as the lead colour. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Cider (https://brandsweets.com/palettes/warm#cider), 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 #a90f21: 9 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 #a90f21 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
- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #a90f21: 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): 7.56:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.78:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #e6142c (4.5:1); AA: background → #c9c9c9 (4.57:1); AAA: text → #f26979 (7.07:1); AAA: background → #f7f7f7 (7.06:1)

## Brands using this color

- **Twilio** — accent #b10f23 (Δ 1.724) — https://brandsweets.com/colors/brands/twilio-com
- **Wendy's** — secondary #b0161f (Δ 1.775) — https://brandsweets.com/colors/brands/wendys-com
- **Trader Joe's** — accent #af0006 (Δ 1.954) — https://brandsweets.com/colors/brands/traderjoes-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/a90f21-c49c9c-62cb8c-2d241f-f1e9ee?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: "#a90f21" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.