# #405b7d

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

## Values

- Hex: `#405b7d`
- RGB: rgb(64, 91, 125)
- HSL: hsl(213, 32%, 37%)
- OKLCH: oklch(0.465 0.064 254.6)
- Relative luminance: 0.1005
- Nearest named color: Deep Indigo (#4c567a, Δ 1.983) — https://brandsweets.com/colors/deep-indigo
- Moods: cool, muted
- Page: https://brandsweets.com/colors/405b7d

## Tints & shades

- Tints (toward white): #4b6a91, #5579a5, #6889b1, #7c98bb, #93abc8, #a7bbd2, #bccadc, #d0dae7, #e4eaf1, #f8fafc
- Shades (toward black): #3b5472, #344a65, #2f435b, #2a3b51, #243447, #1d2a39, #18232f, #131b25, #0c1118, #070a0d

## Harmonies

- Complementary: #7d6140
- Analogous: #407a7d, #43407d
- Triadic: #7d405b, #5b7d40
- Split-complementary: #7d4340, #7a7d40
- Tetradic: #7d407a, #7d6140, #407d43

## Colors that go with #405b7d

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 #405b7d — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #405b7d 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] — 6 real palettes, including Tesco's brand system and Activision's brand system put Blue beside #405b7d, as the supporting colour. Seen in: Tesco (https://brandsweets.com/colors/brands/tesco-com), Activision (https://brandsweets.com/colors/brands/activision-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Pixar (https://brandsweets.com/colors/brands/pixar-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #405b7d: 5 real palettes, including Fintech Trust and Unilever's brand system, as the lead colour. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Unilever (https://brandsweets.com/colors/brands/unilever-com), Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/cobalt
- **Copper** #b87333 [pool] — Designers have shipped Copper with #405b7d: 4 real palettes, including Dusk and Desert Road, as the accent. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Desert Road (https://brandsweets.com/palettes/warm#desert-road), 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 #405b7d in 15 real palettes, including Codecademy's brand system and Costco's brand system, as the accent. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Costco (https://brandsweets.com/colors/brands/costco-com), Walgreens (https://brandsweets.com/colors/brands/walgreens-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/crimson
- **Denim** #1560bd [pool] — Designers have shipped Denim with #405b7d: 16 real palettes, including HP's brand system and The New York Times's brand system, as the accent. Seen in: HP (https://brandsweets.com/colors/brands/hp-com), The New York Times (https://brandsweets.com/colors/brands/nytimes-com), Dutch Bros (https://brandsweets.com/colors/brands/dutchbros-com), Costco (https://brandsweets.com/colors/brands/costco-com). — https://brandsweets.com/colors/denim
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #405b7d: 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): 6.98:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #3e5979 (7.22:1)
- On black (#000000): 3.01:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #5579a5 (4.66:1); AA: background → #d1d1d1 (4.57:1); AAA: text → #7c98bb (7.07:1)

## Curated palettes containing it

- **Harbour** (ocean, cool, muted, editorial) — #3d5a80, #98c1d9, #ee6c4d, #f7f9fb, #293241 — Steel blue and haze with a buoy orange on a pale grey — the maritime palette every port town uses for a reason. — tool: https://brandsweets.com/palettes/new/3d5a80-98c1d9-ee6c4d-f7f9fb-293241 — collection: https://brandsweets.com/palettes/ocean

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/405b7d-9ca9c4-df584e-1f202d-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: "#405b7d" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.