# #2b9ff3

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

## Values

- Hex: `#2b9ff3`
- RGB: rgb(43, 159, 243)
- HSL: hsl(205, 89%, 56%)
- OKLCH: oklch(0.68 0.158 245.8)
- Relative luminance: 0.3178
- Nearest named color: Fresh Blue of Bel Air (#069af3, Δ 1.853) — https://brandsweets.com/colors/fresh-blue-of-bel-air
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/2b9ff3

## Tints & shades

- Tints (toward white): #3ea8f4, #51b1f5, #6abcf6, #7dc4f7, #90cdf9, #a3d6fa, #b7defb, #cfe9fc, #e2f2fd, #f5fbfe
- Shades (toward black): #1395f1, #0d87de, #0b75c1, #0a66a9, #085891, #074978, #063b60, #042943, #031a2b, #010c13

## Harmonies

- Complementary: #f37e2b
- Analogous: #2bf3e2, #2b3cf3
- Triadic: #f32b9f, #9ff32b
- Split-complementary: #f32b3c, #f3e22b
- Tetradic: #e22bf3, #f37e2b, #3cf32b

## Colors that go with #2b9ff3

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 #2b9ff3: softer than #000 and cool enough to feel like part of the same palette. Seen in: Blizzard (https://brandsweets.com/colors/brands/blizzard-com), Lamborghini (https://brandsweets.com/colors/brands/lamborghini-com), Lido (https://brandsweets.com/palettes/vivid#lido), Lagoon (https://brandsweets.com/palettes/vivid#lagoon). — https://brandsweets.com/colors/charcoal
- **Medium Sea Green** #3cb371 [harmony, pool: triadic] — Medium Sea Green completes a triad with #2b9ff3 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Terminal (https://brandsweets.com/palettes/technical#terminal), Unity (https://brandsweets.com/colors/brands/unity-com), Olympics (https://brandsweets.com/colors/brands/olympics-com), Spotify (https://brandsweets.com/colors/brands/spotify). — https://brandsweets.com/colors/mediumseagreen
- **Tomato** #ff6347 [harmony, pool: split] — Tomato is a split-complement of #2b9ff3: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Replit (https://brandsweets.com/colors/brands/replit), Lido (https://brandsweets.com/palettes/vivid#lido), Substack (https://brandsweets.com/colors/brands/substack-com), Abstract (https://brandsweets.com/colors/brands/abstract-com). — https://brandsweets.com/colors/tomato
- **Peru** #cd853f [harmony, pool: complementary] — Peru sits directly opposite #2b9ff3 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Guinness (https://brandsweets.com/colors/brands/guinness-com). — https://brandsweets.com/colors/peru
- **Amber** #ffbf00 [pool] — Amber is paired with #2b9ff3 in 9 real palettes, including Heatwave and Salesforce's brand system, as the supporting colour. Seen in: Heatwave (https://brandsweets.com/palettes/warm#heatwave), Salesforce (https://brandsweets.com/colors/brands/salesforce-com), NBA (https://brandsweets.com/colors/brands/nba-com), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 9 real palettes, including Unity's brand system and Readymag's brand system put Blue beside #2b9ff3, as the supporting colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Warp (https://brandsweets.com/colors/brands/warp-dev). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #2b9ff3 in 4 real palettes, including Elastic's brand system and Learning App, as the lead colour. Seen in: Elastic (https://brandsweets.com/colors/brands/elastic-co), Learning App (https://brandsweets.com/palettes/playful#learning-app), Playground (https://brandsweets.com/palettes/bold#playground), Ahrefs (https://brandsweets.com/colors/brands/ahrefs-com). — https://brandsweets.com/colors/darkorange
- **Denim** #1560bd [pool] — Designers have shipped Denim with #2b9ff3: 9 real palettes, including Apple's brand system and Gopro's brand system, as the accent. Seen in: Apple (https://brandsweets.com/colors/brands/apple-com), Gopro (https://brandsweets.com/colors/brands/gopro-com), Venmo (https://brandsweets.com/colors/brands/venmo-com), Coca-Cola (https://brandsweets.com/colors/brands/coca-cola-com). — https://brandsweets.com/colors/denim

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

- On white (#ffffff): 2.85:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #0c78c6 (4.65:1); AA: background → #303030 (4.62:1); AAA: text → #095b95 (7.14:1); AAA: background → #080808 (7.02:1)
- On black (#000000): 7.36:1 — AA pass, AA-large pass, AAA pass

## Brands using this color

- **JetBrains** — secondary #18a3fa (Δ 1.337) — https://brandsweets.com/colors/brands/jetbrains-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/2b9ff3-9cafc4-df4e58-1f212d-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: "#2b9ff3" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.