# #258bcb

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

## Values

- Hex: `#258bcb`
- RGB: rgb(37, 139, 203)
- HSL: hsl(203, 69%, 47%)
- OKLCH: oklch(0.611 0.132 242.1)
- Relative luminance: 0.2317
- Nearest named color: steelblue (#4682b4, Δ 4.02) — https://brandsweets.com/colors/steelblue
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/258bcb

## Tints & shades

- Tints (toward white): #3098d9, #46a3dd, #5baee1, #71b8e5, #8bc5ea, #a0d0ee, #b6dbf2, #cbe5f6, #e1f0f9, #f6fbfd
- Shades (toward black): #227fb9, #1e71a4, #1b6593, #185981, #154d70, #113e5a, #0d3249, #0a2638, #061822, #030c11

## Harmonies

- Complementary: #cb6525
- Analogous: #25cbb7, #2538cb
- Triadic: #cb258b, #8bcb25
- Split-complementary: #cb2538, #cbb725
- Tetradic: #b725cb, #cb6525, #38cb25

## Colors that go with #258bcb

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 #258bcb: 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
- **Red** #ff0000 [harmony, pool: split] — Red is a split-complement of #258bcb: 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), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), Nike (https://brandsweets.com/colors/brands/nike-com), Databricks (https://brandsweets.com/colors/brands/databricks-com). — https://brandsweets.com/colors/red
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #258bcb 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 #258bcb in 11 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), Google (https://brandsweets.com/colors/brands/google-com), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-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 #258bcb, as the supporting colour. Seen in: Readymag (https://brandsweets.com/colors/brands/readymag-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Unity (https://brandsweets.com/colors/brands/unity-com), Cargo (https://brandsweets.com/colors/brands/cargo-site). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #258bcb: 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
- **Crimson** #dc143c [pool] — Crimson is paired with #258bcb in 12 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), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/crimson
- **Deep Pink** #ff1493 [harmony, pool: triadic] — Deep Pink completes a triad with #258bcb — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: JetBrains (https://brandsweets.com/colors/brands/jetbrains-com), Ubisoft (https://brandsweets.com/colors/brands/ubisoft-com), Maybelline (https://brandsweets.com/colors/brands/maybelline-com). — https://brandsweets.com/colors/deeppink

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

- On white (#ffffff): 3.73:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #217cb5 (4.55:1); AA: background → #1c1c1c (4.57:1); AAA: text → #195c86 (7.2:1)
- On black (#000000): 5.63:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #399ddb (7.02:1)

## Brands using this color

- **Telegram** — accent #0088cc (Δ 1.458) — https://brandsweets.com/colors/brands/telegram-org
- **Telegram** — secondary #318fd3 (Δ 1.757) — https://brandsweets.com/colors/brands/telegram-org

## 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/258bcb-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: "#258bcb" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.