# #681bbb

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

## Values

- Hex: `#681bbb`
- RGB: rgb(104, 27, 187)
- HSL: hsl(269, 75%, 42%)
- OKLCH: oklch(0.447 0.221 297.9)
- Relative luminance: 0.0731
- Nearest named color: Fuchsia Nebula (#7722aa, Δ 4.449) — https://brandsweets.com/colors/fuchsia-nebula
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/681bbb

## Tints & shades

- Tints (toward white): #771fd6, #842de1, #9448e5, #a15ee8, #b179ec, #c094f0, #cdaaf3, #ddc5f7, #eadbfa, #faf6fe
- Shades (toward black): #5e18aa, #551698, #4d148a, #431178, #390f67, #2f0c55, #250a43, #1e0836, #140524, #0a0312

## Harmonies

- Complementary: #6ebb1b
- Analogous: #1b1dbb, #b91bbb
- Triadic: #bb681b, #1bbb68
- Split-complementary: #bbb91b, #1dbb1b
- Tetradic: #bb1b1d, #6ebb1b, #1bbbb9

## Colors that go with #681bbb

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

- **Olive Green** #808000 [harmony: complementary] — Olive Green sits directly opposite #681bbb 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 #681bbb: 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). — https://brandsweets.com/colors/charcoal
- **Denim** #1560bd [pool] — Designers have shipped Denim with #681bbb: 3 real palettes, including Slack's brand system and Linkedin's brand system, as the lead colour. Seen in: Slack (https://brandsweets.com/colors/brands/slack-com), Linkedin (https://brandsweets.com/colors/brands/linkedin-com), Unilever (https://brandsweets.com/colors/brands/unilever-com). — https://brandsweets.com/colors/denim
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #681bbb'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
- **Tomato** #ff6347 [pool] — 3 real palettes, including GitLab's brand system and FedEx's brand system put Tomato beside #681bbb, as the lead colour. Seen in: GitLab (https://brandsweets.com/colors/brands/gitlab), FedEx (https://brandsweets.com/colors/brands/fedex-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com). — https://brandsweets.com/colors/tomato
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #681bbb — 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
- **Forest Green** #228b22 [harmony: split] — Forest Green is a split-complement of #681bbb: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/forestgreen
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #681bbb: two real palettes: Zillow's brand system and Unilever's brand system, as the supporting colour. Seen in: Zillow (https://brandsweets.com/colors/brands/zillow-com), Unilever (https://brandsweets.com/colors/brands/unilever-com). — https://brandsweets.com/colors/cobalt

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

- On white (#ffffff): 8.53:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.46:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9951e6 (4.67:1); AA: background → #bdbdbd (4.54:1); AAA: text → #b37eed (7.12:1); AAA: background → #ebebeb (7.15:1)

## 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/681bbb-b49cc4-cbcb62-2c1f2d-e9e9f1?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: "#681bbb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.