# #640ad1

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

## Values

- Hex: `#640ad1`
- RGB: rgb(100, 10, 209)
- HSL: hsl(267, 91%, 43%)
- OKLCH: oklch(0.456 0.249 292.2)
- Relative luminance: 0.0753
- Nearest named color: Blurple (#5539cc, Δ 5.394) — https://brandsweets.com/colors/blurple
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/640ad1

## Tints & shades

- Tints (toward white): #720bef, #7f1ff4, #903cf6, #9e55f7, #ae72f8, #bc8af9, #cda7fb, #dbc0fc, #ecddfd, #f9f5ff
- Shades (toward black): #5a09be, #5108aa, #480797, #3f0684, #380675, #2e0561, #25044e, #1c033a, #130227, #090113

## Harmonies

- Complementary: #78d10a
- Analogous: #0a14d1, #c70ad1
- Triadic: #d1640a, #0ad164
- Split-complementary: #d1c70a, #14d10a
- Tetradic: #d10a14, #78d10a, #0ad1c7

## Colors that go with #640ad1

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 #640ad1 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 #640ad1: 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 #640ad1: 3 real palettes, including Linkedin's brand system and Unilever's brand system, as the lead colour. Seen in: Linkedin (https://brandsweets.com/colors/brands/linkedin-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Slack (https://brandsweets.com/colors/brands/slack-com). — https://brandsweets.com/colors/denim
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #640ad1's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Yahoo (https://brandsweets.com/colors/brands/yahoo-com), Wayfair (https://brandsweets.com/colors/brands/wayfair-com). — https://brandsweets.com/colors/royalblue
- **Teal** #008080 [harmony, pool: triadic] — Teal completes a triad with #640ad1 — 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), Stripe (https://brandsweets.com/colors/brands/stripe). — https://brandsweets.com/colors/teal
- **Tomato** #ff6347 [pool] — 3 real palettes, including GitLab's brand system and dbt Labs's brand system put Tomato beside #640ad1, as the lead colour. Seen in: GitLab (https://brandsweets.com/colors/brands/gitlab), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com), FedEx (https://brandsweets.com/colors/brands/fedex-com). — https://brandsweets.com/colors/tomato
- **Forest Green** #228b22 [harmony: split] — Forest Green is a split-complement of #640ad1: 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 #640ad1: 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): 8.38:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.51:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #984bf7 (4.68:1); AA: background → #bfbfbf (4.56:1); AAA: text → #b47bf9 (7.14:1); AAA: background → #ebebeb (7.03:1)

## 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/640ad1-b39cc4-dfda4e-2c1f2d-e9eaf1?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: "#640ad1" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.