# #457bd9

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

## Values

- Hex: `#457bd9`
- RGB: rgb(69, 123, 217)
- HSL: hsl(218, 66%, 56%)
- OKLCH: oklch(0.593 0.155 260.7)
- Relative luminance: 0.2044
- Nearest named color: Blue Öyster Cult (#5577ee, Δ 3.848) — https://brandsweets.com/colors/blue-oyster-cult
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/457bd9

## Tints & shades

- Tints (toward white): #5687dc, #6793e0, #7ca2e4, #8daee8, #9ebaeb, #afc6ef, #c0d2f2, #d5e1f6, #e6edfa, #f7f9fd
- Shades (toward black): #306cd5, #2861c3, #2354a9, #1e4a94, #1a3f7f, #16356a, #112a55, #0c1d3b, #081326, #030811

## Harmonies

- Complementary: #d9a345
- Analogous: #45c5d9, #5845d9
- Triadic: #d9457b, #7bd945
- Split-complementary: #d95845, #c5d945
- Tetradic: #d945c5, #d9a345, #45d958

## Colors that go with #457bd9

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 #457bd9: softer than #000 and cool enough to feel like part of the same palette. Seen in: Disney (https://brandsweets.com/colors/brands/disney-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com). — https://brandsweets.com/colors/charcoal
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #457bd9 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). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #457bd9 in 12 real palettes, including Google's brand system and Walmart's brand system, as the accent. Seen in: Google (https://brandsweets.com/colors/brands/google-com), Walmart (https://brandsweets.com/colors/brands/walmart-com), Wired (https://brandsweets.com/colors/brands/wired-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 14 real palettes, including Qualcomm's brand system and Readymag's brand system put Blue beside #457bd9, as the accent. Seen in: Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), BBC (https://brandsweets.com/colors/brands/bbc-com), EA (https://brandsweets.com/colors/brands/ea-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #457bd9: 11 real palettes, including Carrefour's brand system and General Mills's brand system, as the accent. Seen in: Carrefour (https://brandsweets.com/colors/brands/carrefour-com), General Mills (https://brandsweets.com/colors/brands/generalmills-com), Intel (https://brandsweets.com/colors/brands/intel-com), Hershey's (https://brandsweets.com/colors/brands/hersheys-com). — https://brandsweets.com/colors/cobalt
- **Crimson** #dc143c [pool] — Crimson is paired with #457bd9 in 16 real palettes, including Pizza Hut's brand system and NASCAR's brand system, as the supporting colour. Seen in: Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), NASCAR (https://brandsweets.com/colors/brands/nascar-com), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #457bd9: 9 real palettes, including Astro's brand system and Patreon's brand system, as the supporting colour. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Patreon (https://brandsweets.com/colors/brands/patreon-com), Telegram (https://brandsweets.com/colors/brands/telegram-org), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/deepskyblue
- **Emerald Green** #50c878 [pool] — Emerald Green is paired with #457bd9 in 4 real palettes, including Playground and Docker's brand system, as the accent. Seen in: Playground (https://brandsweets.com/palettes/bold#playground), Docker (https://brandsweets.com/colors/brands/docker-com), Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark), Obsidian (https://brandsweets.com/colors/brands/obsidian-md). — https://brandsweets.com/colors/emerald-green

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

- On white (#ffffff): 4.13:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #3872d6 (4.62:1); AA: background → #121212 (4.54:1); AAA: text → #2354a9 (7.21:1)
- On black (#000000): 5.09:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #6b96e1 (7.07:1)

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- 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/457bd9-9ca6c4-df644e-201f2d-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: "#457bd9" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.