# #811bc0

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

## Values

- Hex: `#811bc0`
- RGB: rgb(129, 27, 192)
- HSL: hsl(277, 75%, 43%)
- OKLCH: oklch(0.483 0.23 307)
- Relative luminance: 0.0926
- Nearest named color: Lilac Spring (#8822cc, Δ 2.48) — https://brandsweets.com/colors/lilac-spring
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/811bc0

## Tints & shades

- Tints (toward white): #931fdb, #9e32e2, #ab4ce6, #b563e9, #c27eed, #cd94f0, #d9aff4, #e4c5f7, #f0e0fb, #fbf6fe
- Shades (toward black): #7519ae, #69169c, #5d148a, #511178, #480f6b, #3c0d59, #300a47, #240836, #180524, #0c0312

## Harmonies

- Complementary: #5ac01b
- Analogous: #2f1bc0, #c01bad
- Triadic: #c0811b, #1bc081
- Split-complementary: #adc01b, #1bc02f
- Tetradic: #c02f1b, #5ac01b, #1badc0

## Colors that go with #811bc0

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

- **Denim** #1560bd [pool] — Designers have shipped Denim with #811bc0: 4 real palettes, including Linkedin's brand system and Peacock, as the lead colour. Seen in: Linkedin (https://brandsweets.com/colors/brands/linkedin-com), Peacock (https://brandsweets.com/palettes/vivid#peacock), Slack (https://brandsweets.com/colors/brands/slack-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com). — https://brandsweets.com/colors/denim
- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #811bc0 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 #811bc0: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hasbro (https://brandsweets.com/colors/brands/hasbro-com). — https://brandsweets.com/colors/charcoal
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #811bc0's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Wayfair (https://brandsweets.com/colors/brands/wayfair-com), Yahoo (https://brandsweets.com/colors/brands/yahoo-com). — https://brandsweets.com/colors/royalblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #811bc0 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone). — https://brandsweets.com/colors/teal
- **Sea Green** #2e8b57 [harmony: split] — Sea Green is a split-complement of #811bc0: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/seagreen
- **Crimson** #dc143c [pool] — Crimson is paired with #811bc0 in two real palettes: Gemstone and Wells Fargo's brand system, as the accent. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #811bc0: two real palettes: Kraken's brand system and Render's brand system, as the accent. Seen in: Kraken (https://brandsweets.com/colors/brands/kraken-com), Render (https://brandsweets.com/colors/brands/render-com). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 7.36:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.85:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #a744e4 (4.59:1); AA: background → #cccccc (4.59:1); AAA: text → #c079ec (7.19:1); AAA: background → #fafafa (7.06:1)

## 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/811bc0-b99cc4-bdcb62-2d1f2c-eae9f1?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: "#811bc0" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.