# #404a5e

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

## Values

- Hex: `#404a5e`
- RGB: rgb(64, 74, 94)
- HSL: hsl(220, 19%, 31%)
- OKLCH: oklch(0.408 0.036 264.1)
- Relative luminance: 0.068
- Nearest named color: Abyssal (#404c57, Δ 1.53) — https://brandsweets.com/colors/abyssal
- Moods: cool, muted
- Page: https://brandsweets.com/colors/404a5e

## Tints & shades

- Tints (toward white): #4e5b73, #5b6986, #6a7a9a, #808da8, #95a0b7, #a7b0c3, #bcc3d2, #d1d6e0, #e4e7ec, #f9fafb
- Shades (toward black): #3a4355, #363e4f, #303746, #29303d, #252b37, #1f242e, #191d24, #13151b, #0e1115, #080a0c

## Harmonies

- Complementary: #5e5440
- Analogous: #40595e, #45405e
- Triadic: #5e404a, #4a5e40
- Split-complementary: #5e4540, #595e40
- Tetradic: #5e4059, #5e5440, #405e45

## Colors that go with #404a5e

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 #404a5e'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), Capital One (https://brandsweets.com/colors/brands/capitalone-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/steelblue
- **Blue** #0000ff [pool] — 7 real palettes, including Jeep's brand system and Alaska Airlines's brand system put Blue beside #404a5e, as the accent. Seen in: Jeep (https://brandsweets.com/colors/brands/jeep-com), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 4 real palettes, including Nursery and Garden Wedding put Blush Pink beside #404a5e, as the lead colour. Seen in: Nursery (https://brandsweets.com/palettes/light#nursery), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Blush (https://brandsweets.com/palettes/light#blush), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden). — https://brandsweets.com/colors/blush-pink
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #404a5e: 5 real palettes, including Paper & Pine and Dusk, as the supporting colour. Seen in: Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Dusk (https://brandsweets.com/palettes/cool#dusk), Open House (https://brandsweets.com/palettes/clean#open-house), Alpine (https://brandsweets.com/palettes/cool#alpine). — https://brandsweets.com/colors/cadetblue
- **Champagne** #f7e7ce [pool] — 4 real palettes, including Darkroom and Sweetgreen's brand system put Champagne beside #404a5e, as the surface under it. Seen in: Darkroom (https://brandsweets.com/palettes/muted#darkroom), Sweetgreen (https://brandsweets.com/colors/brands/sweetgreen-com), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Bramble (https://brandsweets.com/palettes/muted#bramble). — https://brandsweets.com/colors/champagne
- **Copper** #b87333 [pool] — Designers have shipped Copper with #404a5e: 5 real palettes, including Desert Road and Dusk, as the lead colour. Seen in: Desert Road (https://brandsweets.com/palettes/warm#desert-road), Dusk (https://brandsweets.com/palettes/cool#dusk), Notion (https://brandsweets.com/colors/brands/notion), Bramble (https://brandsweets.com/palettes/muted#bramble). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #404a5e in 7 real palettes, including Codecademy's brand system and Frost & Ember, as the accent. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #404a5e: 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): 8.9:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.36:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #657595 (4.53:1); AA: background → #bababa (4.59:1); AAA: text → #8c98b1 (7.24:1); AAA: background → #e6e6e6 (7.13:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/404a5e-9ca5c4-df694e-211f2d-e9f0f1?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: "#404a5e" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.