# #398fb1

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

## Values

- Hex: `#398fb1`
- RGB: rgb(57, 143, 177)
- HSL: hsl(197, 51%, 46%)
- OKLCH: oklch(0.613 0.096 227.7)
- Relative luminance: 0.2369
- Nearest named color: Blue Moon (#3992a8, Δ 1.868) — https://brandsweets.com/colors/blue-moon
- Moods: cool, modern
- Page: https://brandsweets.com/colors/398fb1

## Tints & shades

- Tints (toward white): #429ec2, #56a8c8, #6db4d0, #80bdd6, #93c7dc, #a6d1e2, #badbe9, #d1e7f0, #e4f1f6, #f7fbfd
- Shades (toward black): #3483a2, #2f7692, #29677f, #245a70, #1f4e60, #1a4151, #153541, #0f252e, #0a191f, #050c0f

## Harmonies

- Complementary: #b15b39
- Analogous: #39b197, #3953b1
- Triadic: #b1398f, #8fb139
- Split-complementary: #b13953, #b19739
- Tetradic: #9739b1, #b15b39, #53b139

## Colors that go with #398fb1

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 #398fb1: softer than #000 and cool enough to feel like part of the same palette. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Auth0 (https://brandsweets.com/colors/brands/auth0-com), Dusty Blue (https://brandsweets.com/palettes/cool#dusty-blue), Bloomberg (https://brandsweets.com/colors/brands/bloomberg-com). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: split] — Copper is a split-complement of #398fb1: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Notion (https://brandsweets.com/colors/brands/notion), Dusk (https://brandsweets.com/palettes/cool#dusk), Riverbed (https://brandsweets.com/palettes/muted#riverbed), Atelier (https://brandsweets.com/palettes/elegant#atelier). — https://brandsweets.com/colors/copper
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #398fb1: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Redfin (https://brandsweets.com/colors/brands/redfin-com), Diner (https://brandsweets.com/palettes/vivid#diner), NASCAR (https://brandsweets.com/colors/brands/nascar-com). — https://brandsweets.com/colors/crimson
- **Chocolate** #d2691e [harmony, pool: complementary] — Chocolate sits directly opposite #398fb1 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Wellness (https://brandsweets.com/palettes/warm#wellness). — https://brandsweets.com/colors/chocolate
- **Amber** #ffbf00 [pool] — Amber is paired with #398fb1 in 6 real palettes, including Beach Hut and Wired's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Wired (https://brandsweets.com/colors/brands/wired-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #398fb1: 5 real palettes, including Hershey's's brand system and Glacier, as the supporting colour. Seen in: Hershey's (https://brandsweets.com/colors/brands/hersheys-com), Glacier (https://brandsweets.com/palettes/cool#glacier), General Mills (https://brandsweets.com/colors/brands/generalmills-com), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/cobalt
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #398fb1: 8 real palettes, including Telegram's brand system and Deep Water, as the lead colour. Seen in: Telegram (https://brandsweets.com/colors/brands/telegram-org), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Astro (https://brandsweets.com/colors/brands/astro-build), Patreon (https://brandsweets.com/colors/brands/patreon-com). — https://brandsweets.com/colors/deepskyblue
- **Denim** #1560bd [pool] — Designers have shipped Denim with #398fb1: 16 real palettes, including Gopro's brand system and Discover's brand system, as the lead colour. Seen in: Gopro (https://brandsweets.com/colors/brands/gopro-com), Discover (https://brandsweets.com/colors/brands/discover-com), Peacock (https://brandsweets.com/palettes/vivid#peacock), American Express (https://brandsweets.com/colors/brands/americanexpress-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 3.66:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #327d9a (4.63:1); AA: background → #1f1f1f (4.5:1); AAA: text → #255d74 (7.25:1)
- On black (#000000): 5.74:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #46a0c3 (7.08:1)

## Curated palettes containing it

- **Launch Orange** (bold, warm, vivid, modern) — #ea580c, #1c1917, #0891b2, #ffffff — Orange is the rarest SaaS primary, which is exactly why it stands out on a pricing page; cyan keeps it from feeling like a hardware store. — tool: https://brandsweets.com/palettes/new/ea580c-1c1917-0891b2-ffffff — collection: https://brandsweets.com/palettes/bold

## 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/398fb1-9cb4c4-df4e6b-1f232d-e9f1ef?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: "#398fb1" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.