# #398dc0

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

## Values

- Hex: `#398dc0`
- RGB: rgb(57, 141, 192)
- HSL: hsl(203, 54%, 49%)
- OKLCH: oklch(0.615 0.111 239.1)
- Relative luminance: 0.2373
- Nearest named color: steelblue (#4682b4, Δ 3.191) — https://brandsweets.com/colors/steelblue
- Moods: cool, modern
- Page: https://brandsweets.com/colors/398dc0

## Tints & shades

- Tints (toward white): #4a98c9, #5ea4cf, #72afd5, #85badb, #99c5e1, #a9cee5, #bcd9eb, #d0e4f1, #e4eff7, #f7fbfd
- Shades (toward black): #3581b1, #2f739d, #2a678d, #24597a, #204e6a, #1a3f56, #153447, #0f2533, #0b1a23, #050b10

## Harmonies

- Complementary: #c06d39
- Analogous: #39c0b1, #3949c0
- Triadic: #c0398d, #8dc039
- Split-complementary: #c03949, #c0b139
- Tetradic: #b139c0, #c06d39, #49c039

## Colors that go with #398dc0

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 #398dc0: 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), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Red** #ff0000 [harmony, pool: split] — Red is a split-complement of #398dc0: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), Nike (https://brandsweets.com/colors/brands/nike-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Databricks (https://brandsweets.com/colors/brands/databricks-com). — https://brandsweets.com/colors/red
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #398dc0 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Notion (https://brandsweets.com/colors/brands/notion), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #398dc0 in 10 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
- **Blue** #0000ff [pool] — 7 real palettes, including Qualcomm's brand system and Readymag's brand system put Blue beside #398dc0, as the accent. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Unity (https://brandsweets.com/colors/brands/unity-com), Activision (https://brandsweets.com/colors/brands/activision-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #398dc0: 7 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), Intel (https://brandsweets.com/colors/brands/intel-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #398dc0 in 10 real palettes, including NASCAR's brand system and Retro Pop, as the supporting colour. Seen in: NASCAR (https://brandsweets.com/colors/brands/nascar-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), Wendy's (https://brandsweets.com/colors/brands/wendys-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 #398dc0: 9 real palettes, including Telegram's brand system and Astro's brand system, as the lead colour. Seen in: Telegram (https://brandsweets.com/colors/brands/telegram-org), Astro (https://brandsweets.com/colors/brands/astro-build), Deep Water (https://brandsweets.com/palettes/dark#deep-water), Patreon (https://brandsweets.com/colors/brands/patreon-com). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 3.66:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #327ba9 (4.62:1); AA: background → #1f1f1f (4.51:1); AAA: text → #265c7e (7.21:1)
- On black (#000000): 5.75:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #529dcb (7.04:1)

## 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/398dc0-9cb0c4-df4e5d-1f222d-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: "#398dc0" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.