# #6403bf

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

## Values

- Hex: `#6403bf`
- RGB: rgb(100, 3, 191)
- HSL: hsl(271, 97%, 38%)
- OKLCH: oklch(0.435 0.235 296.3)
- Relative luminance: 0.0654
- Nearest named color: Fuchsia Nebula (#7722aa, Δ 6.093) — https://brandsweets.com/colors/fuchsia-nebula
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/6403bf

## Tints & shades

- Tints (toward white): #7403dd, #8404fb, #9222fc, #a140fc, #b05efd, #bf7cfd, #ce9bfd, #dcb9fe, #ebd7fe, #faf5ff
- Shades (toward black): #5c03b0, #52029c, #4a028d, #3f0279, #370269, #2f015a, #250146, #1d0137, #120123, #0b0014

## Harmonies

- Complementary: #5ebf03
- Analogous: #0603bf, #bf03bc
- Triadic: #bf6403, #03bf64
- Split-complementary: #bcbf03, #03bf06
- Tetradic: #bf0603, #5ebf03, #03bcbf

## Colors that go with #6403bf

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 #6403bf 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 #6403bf: 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 #6403bf: 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
- **Tomato** #ff6347 [pool] — 3 real palettes, including FedEx's brand system and dbt Labs's brand system put Tomato beside #6403bf, as the supporting colour. Seen in: FedEx (https://brandsweets.com/colors/brands/fedex-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), GitLab (https://brandsweets.com/colors/brands/gitlab). — https://brandsweets.com/colors/tomato
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #6403bf — 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 #6403bf: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/forestgreen
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #6403bf'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). — https://brandsweets.com/colors/royalblue
- **Blue Violet** #8a2be2 [pool] — Blue Violet is paired with #6403bf in two real palettes: Twitch's brand system and Taco Bell's brand system, as the lead colour. Seen in: Twitch (https://brandsweets.com/colors/brands/twitch-tv), Taco Bell (https://brandsweets.com/colors/brands/tacobell-com). — https://brandsweets.com/colors/blueviolet

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

- On white (#ffffff): 9.1:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.31:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #9f3bfc (4.51:1); AA: background → #b8b8b8 (4.59:1); AAA: text → #bc77fd (7.2:1); AAA: background → #e3e3e3 (7.09:1)

## Brands using this color

- **Zillow** — accent #6000b6 (Δ 1.69) — https://brandsweets.com/colors/brands/zillow-com

## 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/6403bf-b59cc4-c7cb62-2c1f2d-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: "#6403bf" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.