# #644d9d

A color — cool, muted. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#644d9d`
- RGB: rgb(100, 77, 157)
- HSL: hsl(257, 34%, 46%)
- OKLCH: oklch(0.483 0.125 294.5)
- Relative luminance: 0.1045
- Nearest named color: Passion Flower (#6f5698, Δ 3.394) — https://brandsweets.com/colors/passion-flower
- Moods: cool, muted
- Page: https://brandsweets.com/colors/644d9d

## Tints & shades

- Tints (toward white): #7058ad, #7e69b5, #907dbf, #9e8ec7, #ad9fd0, #bcb0d8, #cac1e1, #dcd6eb, #ebe7f3, #f9f8fc
- Shades (toward black): #5b4790, #534082, #483871, #3f3163, #362a55, #2e2348, #251d3a, #1a1429, #110d1b, #09070e

## Harmonies

- Complementary: #879d4d
- Analogous: #4d5f9d, #8c4d9d
- Triadic: #9d644d, #4d9d64
- Split-complementary: #9d8c4d, #5f9d4d
- Tetradic: #9d4d5f, #879d4d, #4d9d8c

## Colors that go with #644d9d

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

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #644d9d: softer than #000 and cool enough to feel like part of the same palette. Seen in: Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com), Harbour (https://brandsweets.com/palettes/cool#harbour). — https://brandsweets.com/colors/charcoal
- **Sea Green** #2e8b57 [harmony, pool: split] — Sea Green is a split-complement of #644d9d: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), Next.js (https://brandsweets.com/colors/brands/nextjs-org). — https://brandsweets.com/colors/seagreen
- **Blue** #0000ff [pool] — 4 real palettes, including Pixar's brand system and Tesco's brand system put Blue beside #644d9d, as the accent. Seen in: Pixar (https://brandsweets.com/colors/brands/pixar-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Activision (https://brandsweets.com/colors/brands/activision-com), CVS (https://brandsweets.com/colors/brands/cvs-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #644d9d in 12 real palettes, including Wells Fargo's brand system and Marvel's brand system, as the lead colour. Seen in: Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Netflix (https://brandsweets.com/colors/brands/netflix), Ulta Beauty (https://brandsweets.com/colors/brands/ulta-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #644d9d: 13 real palettes, including HP's brand system and Linkedin's brand system, as the accent. Seen in: HP (https://brandsweets.com/colors/brands/hp-com), Linkedin (https://brandsweets.com/colors/brands/linkedin-com), Dairy Queen (https://brandsweets.com/colors/brands/dairyqueen-com), Costco (https://brandsweets.com/colors/brands/costco-com). — https://brandsweets.com/colors/denim
- **Midnight Blue** #191970 [pool] — 16 real palettes, including Marvel's brand system and Paramount+'s brand system put Midnight Blue beside #644d9d, as the supporting colour. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), FIFA (https://brandsweets.com/colors/brands/fifa-com). — https://brandsweets.com/colors/midnightblue
- **Red** #ff0000 [pool] — Red is paired with #644d9d in 4 real palettes, including L'Oréal's brand system and Walgreens's brand system, as the supporting colour. Seen in: L'Oréal (https://brandsweets.com/colors/brands/loreal-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Twitch (https://brandsweets.com/colors/brands/twitch-tv). — https://brandsweets.com/colors/red
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #644d9d in 12 real palettes, including Fivetran blue's brand system and Guinness's brand system, as the lead colour. Seen in: Fivetran blue (https://brandsweets.com/colors/brands/fivetran-com), Guinness (https://brandsweets.com/colors/brands/guinness-com), Stripe (https://brandsweets.com/colors/brands/stripe), Wayfair (https://brandsweets.com/colors/brands/wayfair-com). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 6.8:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #604a96 (7.2:1)
- On black (#000000): 3.09:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #7e69b5 (4.57:1); AA: background → #d4d4d4 (4.58:1); AAA: text → #9e8ec7 (7.15:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/644d9d-ac9cc4-dfc24e-291f2d-e9ebf1?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: "#644d9d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.