# #1584bc

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

## Values

- Hex: `#1584bc`
- RGB: rgb(21, 132, 188)
- HSL: hsl(200, 80%, 41%)
- OKLCH: oklch(0.583 0.124 238.4)
- Relative luminance: 0.2029
- Nearest named color: Haddock’s Sweater (#277aba, Δ 2.779) — https://brandsweets.com/colors/haddocks-sweater
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/1584bc

## Tints & shades

- Tints (toward white): #1898d8, #23a5e7, #3eb0ea, #5abced, #75c7f0, #8cd0f2, #a8dbf5, #c3e7f8, #daf0fb, #f6fbfe
- Shades (toward black): #1378aa, #116e9c, #0f618a, #0d5477, #0c4a6a, #0a3d57, #083045, #062432, #041a25, #020d12

## Harmonies

- Complementary: #bc4d15
- Analogous: #15bca0, #1531bc
- Triadic: #bc1584, #84bc15
- Split-complementary: #bc1531, #bca015
- Tetradic: #a015bc, #bc4d15, #31bc15

## Colors that go with #1584bc

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 #1584bc: softer than #000 and cool enough to feel like part of the same palette. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Disney (https://brandsweets.com/colors/brands/disney-com), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #1584bc: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: NASCAR (https://brandsweets.com/colors/brands/nascar-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com), Retro Pop (https://brandsweets.com/palettes/playful#retro-pop), State Farm (https://brandsweets.com/colors/brands/statefarm-com). — https://brandsweets.com/colors/crimson
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #1584bc's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Slate Workspace (https://brandsweets.com/palettes/minimal#slate-workspace), OnePlus (https://brandsweets.com/colors/brands/oneplus-com), Elastic (https://brandsweets.com/colors/brands/elastic-co), Chase (https://brandsweets.com/colors/brands/chase-com). — https://brandsweets.com/colors/royalblue
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #1584bc 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 #1584bc in 10 real palettes, including Wired's brand system and Beach Hut, as the accent. Seen in: Wired (https://brandsweets.com/colors/brands/wired-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 10 real palettes, including Readymag's brand system and Activision's brand system put Blue beside #1584bc, as the supporting colour. Seen in: Readymag (https://brandsweets.com/colors/brands/readymag-com), Activision (https://brandsweets.com/colors/brands/activision-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Pixar (https://brandsweets.com/colors/brands/pixar-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #1584bc: 8 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
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #1584bc: 6 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), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/deepskyblue

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

- On white (#ffffff): 4.15:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #147eb3 (4.5:1); AA: background → #121212 (4.51:1); AAA: text → #0f5e85 (7.09:1)
- On black (#000000): 5.06:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #199ee1 (7.02:1)

## 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/1584bc-9cb2c4-df4e64-1f232d-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: "#1584bc" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.