# #511b01

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

## Values

- Hex: `#511b01`
- RGB: rgb(81, 27, 1)
- HSL: hsl(20, 98%, 16%)
- OKLCH: oklch(0.303 0.088 42.9)
- Relative luminance: 0.0254
- Nearest named color: Chocolate Rush (#4e1b0b, Δ 1.151) — https://brandsweets.com/colors/chocolate-rush
- Moods: warm, vivid, dark, playful, bold, luxury
- Page: https://brandsweets.com/colors/511b01

## Tints & shades

- Tints (toward white): #792901, #a23702, #cf4602, #f75402, #fd6e26, #fd894e, #fea477, #fec2a4, #feddcd, #fff8f5
- Shades (toward black): #4c1a01, #471801, #3d1501, #381301, #321101, #2d0f00, #280e00, #1e0a00, #190900, #140700

## Harmonies

- Complementary: #013651
- Analogous: #51010e, #514301
- Triadic: #01511b, #1b0151
- Split-complementary: #015143, #010e51
- Tetradic: #0e5101, #013651, #430151

## Colors that go with #511b01

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

- **Charcoal** #36454f [role, pool] — Charcoal is the body-text near-black for #511b01: its slight blue cast keeps type crisp beside a warm colour where pure #000 looks heavy. Seen in: Squarespace (https://brandsweets.com/colors/brands/squarespace-com), Boeing (https://brandsweets.com/colors/brands/boeing-com), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), HubSpot (https://brandsweets.com/colors/brands/hubspot-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: analogous] — Crimson is #511b01's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Burger King (https://brandsweets.com/colors/brands/bk-com), M&M's (https://brandsweets.com/colors/brands/mms-com), Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [harmony, pool: split] — Denim is a split-complement of #511b01: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Box (https://brandsweets.com/colors/brands/box-com), Heinz (https://brandsweets.com/colors/brands/heinz-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), YouTube (https://brandsweets.com/colors/brands/youtube-com). — https://brandsweets.com/colors/denim
- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #511b01 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Mushroom (https://brandsweets.com/palettes/neutral#mushroom), Wellness (https://brandsweets.com/palettes/warm#wellness), Subaru (https://brandsweets.com/colors/brands/subaru-com), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: analogous] — Sienna is #511b01's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Harvest (https://brandsweets.com/palettes/warm#harvest), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: complementary] — Teal sits directly opposite #511b01 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Saffron (https://brandsweets.com/palettes/warm#saffron), Magazine Ochre (https://brandsweets.com/palettes/editorial#magazine-ochre), Gusto (https://brandsweets.com/colors/brands/gusto-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #511b01 in 6 real palettes, including Maple and McDonald's's brand system, as the accent. Seen in: Maple (https://brandsweets.com/palettes/warm#maple), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 9 real palettes, including Tim Hortons's brand system and Headspace's brand system put Blue beside #511b01, as the accent. Seen in: Tim Hortons (https://brandsweets.com/colors/brands/timhortons-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/blue

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

- On white (#ffffff): 13.93:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.51:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #cf4602 (4.53:1); AA: background → #949494 (4.59:1); AAA: text → #fd671c (7.13:1); AAA: background → #b8b8b8 (7.02:1)

## 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
- luxury: https://brandsweets.com/fonts/mood/luxury

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/511b01-c4ae9c-62cbbb-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: "#511b01" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.