# #671b8d

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

## Values

- Hex: `#671b8d`
- RGB: rgb(103, 27, 141)
- HSL: hsl(280, 68%, 33%)
- OKLCH: oklch(0.405 0.177 311)
- Relative luminance: 0.0559
- Nearest named color: Extraviolet (#661188, Δ 1.478) — https://brandsweets.com/colors/extraviolet
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/671b8d

## Tints & shades

- Tints (toward white): #7d21ab, #9026c5, #a236d9, #ae4fde, #bc6de3, #c887e8, #d6a5ee, #e1bff3, #efddf8, #fbf6fd
- Shades (toward black): #5e1881, #541674, #4b1467, #42115a, #3b1051, #320d45, #290b38, #1f082b, #16061e, #0d0311

## Harmonies

- Complementary: #418d1b
- Analogous: #2e1b8d, #8d1b7a
- Triadic: #8d671b, #1b8d67
- Split-complementary: #7a8d1b, #1b8d2e
- Tetradic: #8d2e1b, #418d1b, #1b7a8d

## Colors that go with #671b8d

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

- **Forest Green** #228b22 [harmony: complementary] — Forest Green sits directly opposite #671b8d 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/forestgreen
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #671b8d: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [pool] — Crimson is paired with #671b8d in 3 real palettes, including Lenovo's brand system and Wells Fargo's brand system, as the supporting colour. Seen in: Lenovo (https://brandsweets.com/colors/brands/lenovo-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone). — https://brandsweets.com/colors/crimson
- **Tomato** #ff6347 [pool] — 3 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #671b8d, as the supporting colour. Seen in: FedEx (https://brandsweets.com/colors/brands/fedex-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), Golden Hour (https://brandsweets.com/palettes/warm#golden-hour). — https://brandsweets.com/colors/tomato
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #671b8d — 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 #671b8d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/seagreen
- **Olive Green** #808000 [harmony: split] — Olive Green is a split-complement of #671b8d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/olive
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #671b8d in two real palettes: Taco Bell's brand system and Twitch's brand system, as the supporting colour. Seen in: Taco Bell (https://brandsweets.com/colors/brands/tacobell-com), Twitch (https://brandsweets.com/colors/brands/twitch-tv). — https://brandsweets.com/colors/blueviolet

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

- On white (#ffffff): 9.91:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.12:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #aa47dc (4.64:1); AA: background → #b0b0b0 (4.57:1); AAA: text → #c27ae6 (7.22:1); AAA: background → #d9d9d9 (7.02:1)

## 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/671b8d-b99fc1-b8cb62-2d1f2c-ebe9f1?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: "#671b8d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.