# #1d83bf

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

## Values

- Hex: `#1d83bf`
- RGB: rgb(29, 131, 191)
- HSL: hsl(202, 74%, 43%)
- OKLCH: oklch(0.584 0.127 241.2)
- Relative luminance: 0.2026
- Nearest named color: Haddock’s Sweater (#277aba, Δ 2.482) — https://brandsweets.com/colors/haddocks-sweater
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/1d83bf

## Tints & shades

- Tints (toward white): #2096d9, #33a1e1, #4eade4, #64b7e8, #7ec4ec, #95ceef, #afdaf3, #c5e4f6, #e0f1fa, #f6fbfe
- Shades (toward black): #1a77ad, #176b9b, #155f8a, #125278, #10496a, #0d3d59, #0b3147, #082535, #051823, #030c12

## Harmonies

- Complementary: #bf581d
- Analogous: #1dbfa9, #1d32bf
- Triadic: #bf1d83, #83bf1d
- Split-complementary: #bf1d32, #bfa91d
- Tetradic: #a91dbf, #bf581d, #32bf1d

## Colors that go with #1d83bf

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 #1d83bf: 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 #1d83bf: 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
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #1d83bf 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 #1d83bf 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] — 11 real palettes, including Readymag's brand system and Qualcomm's brand system put Blue beside #1d83bf, as the supporting colour. Seen in: Readymag (https://brandsweets.com/colors/brands/readymag-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Activision (https://brandsweets.com/colors/brands/activision-com), Pixar (https://brandsweets.com/colors/brands/pixar-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #1d83bf: 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 #1d83bf: 7 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), Venmo (https://brandsweets.com/colors/brands/venmo-com). — https://brandsweets.com/colors/deepskyblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #1d83bf: 5 real palettes, including Honda's brand system and AT&T's brand system, as the supporting colour. Seen in: Honda (https://brandsweets.com/colors/brands/honda-com), AT&T (https://brandsweets.com/colors/brands/att-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 4.16:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #1b7db6 (4.51:1); AA: background → #121212 (4.51:1); AAA: text → #145c85 (7.24:1)
- On black (#000000): 5.05:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #2e9fe0 (7.15:1)

## Brands using this color

- **Olympics** — primary #0081c8 (Δ 1.755) — https://brandsweets.com/colors/brands/olympics-com
- **Wired** — primary #057dbc (Δ 1.977) — https://brandsweets.com/colors/brands/wired-com

## 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/1d83bf-9cb1c4-df4e5f-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: "#1d83bf" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.