# #405e6d

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

## Values

- Hex: `#405e6d`
- RGB: rgb(64, 94, 109)
- HSL: hsl(200, 26%, 34%)
- OKLCH: oklch(0.464 0.043 230.5)
- Relative luminance: 0.102
- Nearest named color: Atlantis (#336172, Δ 1.568) — https://brandsweets.com/colors/atlantis
- Moods: cool, muted
- Page: https://brandsweets.com/colors/405e6d

## Tints & shades

- Tints (toward white): #4b6f81, #598297, #6892a6, #7ea2b4, #92b0bf, #a5beca, #bcced7, #cfdce3, #e5ecf0, #f9fafb
- Shades (toward black): #3a5664, #354e5a, #2f4550, #2a3d47, #24353d, #1e2c33, #19242a, #131c20, #0d1316, #080b0d

## Harmonies

- Complementary: #6d4f40
- Analogous: #406d66, #40486d
- Triadic: #6d405e, #5e6d40
- Split-complementary: #6d4048, #6d6640
- Tetradic: #66406d, #6d4f40, #486d40

## Colors that go with #405e6d

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 #405e6d'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), Discover (https://brandsweets.com/colors/brands/discover-com), American Express (https://brandsweets.com/colors/brands/americanexpress-com). — https://brandsweets.com/colors/steelblue
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #405e6d on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: BrandSweets (https://brandsweets.com/colors/brands/brandsweets). — https://brandsweets.com/colors/sienna
- **Blue** #0000ff [pool] — 7 real palettes, including Warp's brand system and Rolex's brand system put Blue beside #405e6d, as the supporting colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Rolex (https://brandsweets.com/colors/brands/rolex-com), Tesco (https://brandsweets.com/colors/brands/tesco-com), Activision (https://brandsweets.com/colors/brands/activision-com). — https://brandsweets.com/colors/blue
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #405e6d: 4 real palettes, including Dusk and Open House, as the supporting colour. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Open House (https://brandsweets.com/palettes/clean#open-house), Alpine (https://brandsweets.com/palettes/cool#alpine), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine). — https://brandsweets.com/colors/cadetblue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #405e6d: 4 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), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen), Riverbed (https://brandsweets.com/palettes/muted#riverbed). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #405e6d in 9 real palettes, including Codecademy's brand system and Gemstone, as the accent. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Wendy's (https://brandsweets.com/colors/brands/wendys-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop). — https://brandsweets.com/colors/crimson
- **Dark Goldenrod** #b8860b [pool] — 4 real palettes, including Puma's brand system and Rolex's brand system put Dark Goldenrod beside #405e6d, as the supporting colour. Seen in: Puma (https://brandsweets.com/colors/brands/puma-com), Rolex (https://brandsweets.com/colors/brands/rolex-com), Cider (https://brandsweets.com/palettes/warm#cider), Greige (https://brandsweets.com/palettes/neutral#greige). — https://brandsweets.com/colors/darkgoldenrod
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #405e6d: 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): 6.91:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #3e5b6a (7.22:1)
- On black (#000000): 3.04:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #537a8d (4.54:1); AA: background → #d1d1d1 (4.52:1); AAA: text → #759bae (7.06:1)

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/405e6d-9cb2c4-df4e64-1f232d-e9f1f0?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: "#405e6d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.