# #271c9b

A color — cool, vivid, technical, modern. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#271c9b`
- RGB: rgb(39, 28, 155)
- HSL: hsl(245, 69%, 36%)
- OKLCH: oklch(0.351 0.191 274.2)
- Relative luminance: 0.0363
- Nearest named color: Deepsea Kraken (#082599, Δ 3.088) — https://brandsweets.com/colors/deepsea-kraken
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/271c9b

## Tints & shades

- Tints (toward white): #2e21b5, #3426cf, #4a3ddb, #6257e0, #7a71e5, #938bea, #aba5ee, #c7c3f4, #dfddf9, #f7f6fd
- Shades (toward black): #241a8e, #211881, #1c1570, #191263, #161056, #120d49, #0f0b3c, #0b082b, #08061e, #040311

## Harmonies

- Complementary: #919b1c
- Analogous: #1c519b, #661c9b
- Triadic: #9b271c, #1c9b27
- Split-complementary: #9b661c, #519b1c
- Tetradic: #9b1c51, #919b1c, #1c9b66

## Colors that go with #271c9b

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

- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #271c9b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier), FedEx (https://brandsweets.com/colors/brands/fedex-com). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 4 real palettes, including Procter & Gamble's brand system and Pfizer's brand system put Blue beside #271c9b, as the supporting colour. Seen in: Procter & Gamble (https://brandsweets.com/colors/brands/pg-com), Pfizer (https://brandsweets.com/colors/brands/pfizer-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Zillow (https://brandsweets.com/colors/brands/zillow-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #271c9b in 6 real palettes, including Pepsi's brand system and Casper Sleep's brand system, as the supporting colour. Seen in: Pepsi (https://brandsweets.com/colors/brands/pepsi-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #271c9b: 6 real palettes, including Warbyparker's brand system and Unilever's brand system, as the accent. Seen in: Warbyparker (https://brandsweets.com/colors/brands/warbyparker-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com), Intel (https://brandsweets.com/colors/brands/intel-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #271c9b: 4 real palettes, including Nintendo's brand system and 3M's brand system, as the accent. Seen in: Nintendo (https://brandsweets.com/colors/brands/nintendo-com), 3M (https://brandsweets.com/colors/brands/3m-com), MLB (https://brandsweets.com/colors/brands/mlb-com), Datadog (https://brandsweets.com/colors/brands/datadoghq-com). — https://brandsweets.com/colors/firebrick
- **Red** #ff0000 [pool] — Red is paired with #271c9b in 4 real palettes, including 3M's brand system and Walgreens's brand system, as the lead colour. Seen in: 3M (https://brandsweets.com/colors/brands/3m-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Hyundai (https://brandsweets.com/colors/brands/hyundaiusa-com), Twitch (https://brandsweets.com/colors/brands/twitch-tv). — https://brandsweets.com/colors/red
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #271c9b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. — https://brandsweets.com/colors/olive
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #271c9b: softer than #000 and cool enough to feel like part of the same palette. Seen in: dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Boeing (https://brandsweets.com/colors/brands/boeing-com). — https://brandsweets.com/colors/charcoal

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

- On white (#ffffff): 12.17:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.73:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #6e64e3 (4.6:1); AA: background → #9e9e9e (4.54:1); AAA: text → #938bea (7.12:1); AAA: background → #c7c7c7 (7.2:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/271c9b-a49cc4-dfa54e-261f2d-e9ecf1?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: "#271c9b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.