# #437398

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

## Values

- Hex: `#437398`
- RGB: rgb(67, 115, 152)
- HSL: hsl(206, 39%, 43%)
- OKLCH: oklch(0.537 0.078 243.2)
- Relative luminance: 0.1572
- Nearest named color: Harbour Blue (#417491, Δ 1.279) — https://brandsweets.com/colors/harbour-blue
- Moods: cool, modern
- Page: https://brandsweets.com/colors/437398

## Tints & shades

- Tints (toward white): #4c83ae, #5c90b7, #719ec1, #83aac9, #98b9d2, #aac5da, #bfd3e3, #d1e0eb, #e6eef4, #f8fafc
- Shades (toward black): #3d698a, #365e7c, #30536e, #2a4860, #254055, #1f3647, #192b39, #13202b, #0c151c, #060b0e

## Harmonies

- Complementary: #986843
- Analogous: #439893, #434998
- Triadic: #984373, #739843
- Split-complementary: #984349, #989343
- Tetradic: #934398, #986843, #499843

## Colors that go with #437398

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

- **Charcoal** #36454f [role, pool] — Charcoal is the text near-black for #437398: softer than #000 and cool enough to feel like part of the same palette. Seen in: Campus (https://brandsweets.com/palettes/friendly#campus), Auth0 (https://brandsweets.com/colors/brands/auth0-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Amazon (https://brandsweets.com/colors/brands/amazon-com). — https://brandsweets.com/colors/charcoal
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #437398 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Dyson (https://brandsweets.com/colors/brands/dyson-com). — https://brandsweets.com/colors/sienna
- **Amber** #ffbf00 [pool] — Amber is paired with #437398 in 8 real palettes, including Lemon Squeezy's brand system and Beach Hut, as the lead colour. Seen in: Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wired (https://brandsweets.com/colors/brands/wired-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #437398: 7 real palettes, including Fintech Trust and Glacier, as the lead colour. Seen in: Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier), Hershey's (https://brandsweets.com/colors/brands/hersheys-com), General Mills (https://brandsweets.com/colors/brands/generalmills-com). — https://brandsweets.com/colors/cobalt
- **Copper** #b87333 [pool] — Designers have shipped Copper with #437398: 5 real palettes, including Dusk and Riverbed, as the accent. Seen in: Dusk (https://brandsweets.com/palettes/cool#dusk), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Desert Road (https://brandsweets.com/palettes/warm#desert-road), Notion (https://brandsweets.com/colors/brands/notion). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [pool] — Crimson is paired with #437398 in 15 real palettes, including Retro Pop and Wendy's's brand system, as the lead colour. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wendy's (https://brandsweets.com/colors/brands/wendys-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Redfin (https://brandsweets.com/colors/brands/redfin-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #437398: 4 real palettes, including Deep Water and Venmo's brand system, as the lead colour. Seen in: Deep Water (https://brandsweets.com/palettes/dark#deep-water), Venmo (https://brandsweets.com/colors/brands/venmo-com), Astro (https://brandsweets.com/colors/brands/astro-build), Telegram (https://brandsweets.com/colors/brands/telegram-org). — https://brandsweets.com/colors/deepskyblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #437398: 6 real palettes, including Wendy's's brand system and Honda's brand system, as the supporting colour. Seen in: Wendy's (https://brandsweets.com/colors/brands/wendys-com), Honda (https://brandsweets.com/colors/brands/honda-com), AT&T (https://brandsweets.com/colors/brands/att-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 5.07:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #355b79 (7.18:1)
- On black (#000000): 4.14:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #4679a0 (4.5:1); AA: background → #f2f2f2 (4.53:1); AAA: text → #6e9cbf (7.17:1)

## Fonts for this mood

- modern: https://brandsweets.com/fonts/mood/modern

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/437398-9caec4-df4e56-1f212d-e9f1f1?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: "#437398" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.