# #40376d

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

## Values

- Hex: `#40376d`
- RGB: rgb(64, 55, 109)
- HSL: hsl(250, 33%, 32%)
- OKLCH: oklch(0.374 0.09 288.9)
- Relative luminance: 0.0493
- Nearest named color: Her Highness (#432e6f, Δ 2.487) — https://brandsweets.com/colors/her-highness
- Moods: cool, muted
- Page: https://brandsweets.com/colors/40376d

## Tints & shades

- Tints (toward white): #4e4384, #5a4d99, #6a5cad, #7c71b7, #9288c3, #a8a0cf, #bbb4d9, #d0cce5, #e3e0f0, #f9f8fc
- Shades (toward black): #3a3262, #342c58, #302951, #2a2447, #241f3d, #1e1a33, #181529, #141122, #0e0c18, #08070e

## Harmonies

- Complementary: #646d37
- Analogous: #37496d, #5b376d
- Triadic: #6d4037, #376d40
- Split-complementary: #6d5b37, #496d37
- Tetradic: #6d3749, #646d37, #376d5b

## Colors that go with #40376d

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

- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #40376d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Glacier (https://brandsweets.com/palettes/cool#glacier), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 8 real palettes, including Alaska Airlines's brand system and CVS's brand system put Blue beside #40376d, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com). — https://brandsweets.com/colors/blue
- **Crimson** #dc143c [pool] — Crimson is paired with #40376d in 8 real palettes, including Marvel's brand system and Casper Sleep's brand system, as the accent. Seen in: Marvel (https://brandsweets.com/colors/brands/marvel-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Codecademy (https://brandsweets.com/colors/brands/codecademy-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #40376d: 16 real palettes, including Hinge's brand system and Jack Daniel's's brand system, as the accent. 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), Hasbro (https://brandsweets.com/colors/brands/hasbro-com). — https://brandsweets.com/colors/denim
- **Light Sea Green** #20b2aa [pool] — Light Sea Green shows up next to #40376d in 4 real palettes, including Confluent's brand system and Taco Bell's brand system, as the accent. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Taco Bell (https://brandsweets.com/colors/brands/tacobell-com), Lido (https://brandsweets.com/palettes/vivid#lido), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/lightseagreen
- **Midnight Blue** #191970 [pool] — 11 real palettes, including Microsoft's brand system and First Snow put Midnight Blue beside #40376d, as the accent. Seen in: Microsoft (https://brandsweets.com/colors/brands/microsoft-com), First Snow (https://brandsweets.com/palettes/cool#first-snow), Gillette (https://brandsweets.com/colors/brands/gillette-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/midnightblue
- **Orange Red** #ff4500 [pool] — Orange Red is paired with #40376d in 5 real palettes, including Tumblr's brand system and NASA's brand system, as the accent. Seen in: Tumblr (https://brandsweets.com/colors/brands/tumblr-com), NASA (https://brandsweets.com/colors/brands/nasa-gov), Tide (https://brandsweets.com/colors/brands/tide-com), Audi (https://brandsweets.com/colors/brands/audi-com). — https://brandsweets.com/colors/orangered
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #40376d: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 10.58:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.99:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #796db6 (4.68:1); AA: background → #ababab (4.61:1); AAA: text → #988fc7 (7.09:1); AAA: background → #d4d4d4 (7.14:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/40376d-a79cc4-dfb14e-281f2d-e9ecf1?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: "#40376d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.