# #399aea

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

## Values

- Hex: `#399aea`
- RGB: rgb(57, 154, 234)
- HSL: hsl(207, 81%, 57%)
- OKLCH: oklch(0.667 0.149 247.5)
- Relative luminance: 0.2992
- Nearest named color: Fresh Blue of Bel Air (#069af3, Δ 2.059) — https://brandsweets.com/colors/fresh-blue-of-bel-air
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/399aea

## Tints & shades

- Tints (toward white): #4ba4ec, #5dadee, #70b6f0, #82c0f2, #99cbf4, #acd5f6, #bedef8, #d1e8fa, #e3f1fc, #f6fafe
- Shades (toward black): #218fe8, #167fd4, #1471bd, #1163a6, #0f558f, #0c4573, #0a375c, #072945, #04192a, #020b12

## Harmonies

- Complementary: #ea8839
- Analogous: #39eae1, #3941ea
- Triadic: #ea399a, #9aea39
- Split-complementary: #ea3941, #eae139
- Tetradic: #e139ea, #ea8839, #41ea39

## Colors that go with #399aea

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 #399aea: 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
- **Tomato** #ff6347 [harmony, pool: split] — Tomato is a split-complement of #399aea: 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
- **Bronze** #cd7f32 [harmony, pool: complementary] — Bronze sits directly opposite #399aea on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Opensea (https://brandsweets.com/colors/brands/opensea-io). — https://brandsweets.com/colors/bronze
- **Amber** #ffbf00 [pool] — Amber is paired with #399aea in 10 real palettes, including Heatwave and Google's brand system, as the supporting colour. Seen in: Heatwave (https://brandsweets.com/palettes/warm#heatwave), Google (https://brandsweets.com/colors/brands/google-com), NBA (https://brandsweets.com/colors/brands/nba-com), Salesforce (https://brandsweets.com/colors/brands/salesforce-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 11 real palettes, including Unity's brand system and Qualcomm's brand system put Blue beside #399aea, as the supporting colour. Seen in: Unity (https://brandsweets.com/colors/brands/unity-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), Readymag (https://brandsweets.com/colors/brands/readymag-com), Cargo (https://brandsweets.com/colors/brands/cargo-site). — https://brandsweets.com/colors/blue
- **Dark Orange** #ff8c00 [pool] — Dark Orange shows up next to #399aea 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 #399aea: 13 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
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #399aea in 5 real palettes, including Liquid Death's brand system and Disney's brand system, as the accent. Seen in: Liquid Death (https://brandsweets.com/colors/brands/liquiddeath-com), Disney (https://brandsweets.com/colors/brands/disney-com), Chevrolet (https://brandsweets.com/colors/brands/chevrolet-com), Ledger Dark (https://brandsweets.com/palettes/dark#ledger-dark). — https://brandsweets.com/colors/goldenrod

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

- On white (#ffffff): 3.01:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #1579cb (4.54:1); AA: background → #2e2e2e (4.52:1); AAA: text → #105b98 (7.07:1)
- On black (#000000): 6.98:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #3d9deb (7.22:1)

## 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/399aea-9cadc4-df4e53-1f212d-e9f1f1?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: "#399aea" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.