# #40497d

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

## Values

- Hex: `#40497d`
- RGB: rgb(64, 73, 125)
- HSL: hsl(231, 32%, 37%)
- OKLCH: oklch(0.423 0.087 274.6)
- Relative luminance: 0.0734
- Nearest named color: Assassin (#2d4f83, Δ 2.731) — https://brandsweets.com/colors/assassin
- Moods: cool, muted
- Page: https://brandsweets.com/colors/40497d

## Tints & shades

- Tints (toward white): #4b5591, #5561a5, #6873b1, #7c85bb, #939bc8, #a7aed2, #bcc1dc, #d0d3e7, #e4e6f1, #f8f9fc
- Shades (toward black): #3b4372, #343b65, #2f355b, #2a2f51, #242a47, #1d2239, #181c2f, #131625, #0c0e18, #07080d

## Harmonies

- Complementary: #7d7340
- Analogous: #40677d, #55407d
- Triadic: #7d4049, #497d40
- Split-complementary: #7d5540, #677d40
- Tetradic: #7d4067, #7d7340, #407d55

## Colors that go with #40497d

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

- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #40497d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Subaru (https://brandsweets.com/colors/brands/subaru-com), Netflix (https://brandsweets.com/colors/brands/netflix), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #40497d's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Capital One (https://brandsweets.com/colors/brands/capitalone-com), Auth0 (https://brandsweets.com/colors/brands/auth0-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] — 7 real palettes, including CVS's brand system and Tesco's brand system put Blue beside #40497d, as the supporting colour. Seen in: CVS (https://brandsweets.com/colors/brands/cvs-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Procter & Gamble (https://brandsweets.com/colors/brands/pg-com). — https://brandsweets.com/colors/blue
- **Cornflower Blue** #6495ed [pool] — Designers have shipped Cornflower Blue with #40497d: 4 real palettes, including Blue Mono and Blizzard's brand system, as the supporting colour. Seen in: Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Blizzard (https://brandsweets.com/colors/brands/blizzard-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com), Gopro (https://brandsweets.com/colors/brands/gopro-com). — https://brandsweets.com/colors/cornflowerblue
- **Crimson** #dc143c [pool] — Crimson is paired with #40497d in 13 real palettes, including Walgreens's brand system and Wells Fargo's brand system, as the lead colour. Seen in: Walgreens (https://brandsweets.com/colors/brands/walgreens-com), Wells Fargo (https://brandsweets.com/colors/brands/wellsfargo-com), Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #40497d: 15 real palettes, including HP's brand system and Unilever's brand system, as the accent. Seen in: HP (https://brandsweets.com/colors/brands/hp-com), Unilever (https://brandsweets.com/colors/brands/unilever-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #40497d: 4 real palettes, including Datadog's brand system and Fireside, as the accent. Seen in: Datadog (https://brandsweets.com/colors/brands/datadoghq-com), Fireside (https://brandsweets.com/palettes/dark#fireside), Campbell's (https://brandsweets.com/colors/brands/campbells-com), Nintendo (https://brandsweets.com/colors/brands/nintendo-com). — https://brandsweets.com/colors/firebrick
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #40497d: 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): 8.51:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.47:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #6873b1 (4.68:1); AA: background → #bdbdbd (4.53:1); AAA: text → #8d95c4 (7.23:1); AAA: background → #ebebeb (7.14:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/40497d-9c9ec4-df834e-231f2d-e9eef1?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: "#40497d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.