# #a639f9

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

## Values

- Hex: `#a639f9`
- RGB: rgb(166, 57, 249)
- HSL: hsl(274, 94%, 60%)
- OKLCH: oklch(0.597 0.265 305.2)
- Relative luminance: 0.1787
- Nearest named color: Magenta Affair (#aa44dd, Δ 4.692) — https://brandsweets.com/colors/magenta-affair
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/a639f9

## Tints & shades

- Tints (toward white): #af4df9, #b861fa, #be70fb, #c783fb, #d097fc, #d9abfc, #e2bffd, #e9cefd, #f2e1fe, #fbf5ff
- Shades (toward black): #981bf8, #8d07f2, #7b07d5, #6d06bc, #5c059e, #4b0481, #3c0368, #2b024a, #1d0231, #0b0114

## Harmonies

- Complementary: #8cf939
- Analogous: #4639f9, #f939ec
- Triadic: #f9a639, #39f9a6
- Split-complementary: #ecf939, #39f946
- Tetradic: #f94639, #8cf939, #39ecf9

## Colors that go with #a639f9

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

- **Olive Drab** #6b8e23 [harmony: complementary] — Olive Drab sits directly opposite #a639f9 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/olivedrab
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #a639f9: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Next.js (https://brandsweets.com/colors/brands/nextjs-org). — https://brandsweets.com/colors/seagreen
- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #a639f9: 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
- **Denim** #1560bd [pool] — Designers have shipped Denim with #a639f9: 3 real palettes, including Linkedin's brand system and Hasbro's brand system, as the lead colour. Seen in: Linkedin (https://brandsweets.com/colors/brands/linkedin-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com), Peacock (https://brandsweets.com/palettes/vivid#peacock). — https://brandsweets.com/colors/denim
- **Medium Slate Blue** #7b68ee [harmony, pool: analogous] — Medium Slate Blue is #a639f9's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: monday.com (https://brandsweets.com/colors/brands/monday-com), ClickUp (https://brandsweets.com/colors/brands/clickup-com). — https://brandsweets.com/colors/mediumslateblue
- **Dark Cyan** #008b8b [harmony, pool: triadic] — Dark Cyan completes a triad with #a639f9 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Peacock (https://brandsweets.com/palettes/vivid#peacock). — https://brandsweets.com/colors/darkcyan
- **Olive Green** #808000 [harmony: split] — Olive Green is a split-complement of #a639f9: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. — https://brandsweets.com/colors/olive
- **Light Sea Green** #20b2aa [pool] — Light Sea Green shows up next to #a639f9 in two real palettes: Taco Bell's brand system and Circuit, as the accent. Seen in: Taco Bell (https://brandsweets.com/colors/brands/tacobell-com), Circuit (https://brandsweets.com/palettes/technical#circuit). — https://brandsweets.com/colors/lightseagreen

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

- On white (#ffffff): 4.59:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #7e07da (7.17:1)
- On black (#000000): 4.57:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #c174fb (7.16:1)

## Brands using this color

- **Udemy** — primary #a435f0 (Δ 1.513) — https://brandsweets.com/colors/brands/udemy-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/a639f9-b79cc4-c2cb62-2d1f2d-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: "#a639f9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.