# #15436a

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

## Values

- Hex: `#15436a`
- RGB: rgb(21, 67, 106)
- HSL: hsl(208, 67%, 25%)
- OKLCH: oklch(0.373 0.083 248)
- Relative luminance: 0.0521
- Nearest named color: Aegean Blue (#1b416f, Δ 1.247) — https://brandsweets.com/colors/aegean-blue
- Moods: cool, vivid, dark, technical, modern, luxury, bold
- Page: https://brandsweets.com/colors/15436a

## Tints & shades

- Tints (toward white): #1b5588, #226baa, #287dc8, #3b8fd8, #5da2df, #7bb3e5, #99c5eb, #b7d6f1, #d9e9f7, #f6fafd
- Shades (toward black): #133d62, #123859, #103351, #0e2d48, #0d2840, #0a2033, #081b2b, #071522, #05101a, #030b11

## Harmonies

- Complementary: #6a3d15
- Analogous: #156a68, #15186a
- Triadic: #6a1543, #436a15
- Split-complementary: #6a1518, #6a6815
- Tetradic: #68156a, #6a3d15, #186a15

## Colors that go with #15436a

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #15436a — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), Casper Sleep (https://brandsweets.com/colors/brands/casper-com). — https://brandsweets.com/colors/crimson
- **Teal** #008080 [harmony, pool: analogous] — Teal is #15436a's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Stanley (https://brandsweets.com/colors/brands/stanley1913-com), Gusto (https://brandsweets.com/colors/brands/gusto-com), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), N26 (https://brandsweets.com/colors/brands/n26-com). — https://brandsweets.com/colors/teal
- **Blue** #0000ff [pool] — 9 real palettes, including Alaska Airlines's brand system and Jeep's brand system put Blue beside #15436a, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), CVS (https://brandsweets.com/colors/brands/cvs-com), Tesco (https://brandsweets.com/colors/brands/tesco-com). — https://brandsweets.com/colors/blue
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #15436a: 5 real palettes, including Open House and Paper & Pine, as the supporting colour. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine), Coastal (https://brandsweets.com/palettes/cool#coastal), Dusk (https://brandsweets.com/palettes/cool#dusk). — https://brandsweets.com/colors/cadetblue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #15436a: 4 real palettes, including Notion's brand system and Desert Road. Seen in: Notion (https://brandsweets.com/colors/brands/notion), Desert Road (https://brandsweets.com/palettes/warm#desert-road), Dusk (https://brandsweets.com/palettes/cool#dusk), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty). — https://brandsweets.com/colors/copper
- **Denim** #1560bd [pool] — Designers have shipped Denim with #15436a: 19 real palettes, including Hasbro's brand system and Hinge's brand system, as the supporting colour. Seen in: Hasbro (https://brandsweets.com/colors/brands/hasbro-com), Hinge (https://brandsweets.com/colors/brands/hinge-co), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Starlink (https://brandsweets.com/colors/brands/starlink-com). — https://brandsweets.com/colors/denim
- **Emerald Green** #50c878 [pool] — Emerald Green is paired with #15436a in 5 real palettes, including Docker's brand system and Minecraft's brand system, as the accent. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Chime (https://brandsweets.com/colors/brands/chime-com), WhatsApp (https://brandsweets.com/colors/brands/whatsapp-com). — https://brandsweets.com/colors/emerald-green
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #15436a: a clean near-white with no warm cast, so the cool hue stays clear instead of drifting muddy. — https://brandsweets.com/colors/whitesmoke

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

- On white (#ffffff): 10.28:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 2.04:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #2678c0 (4.53:1); AA: background → #adadad (4.58:1); AAA: text → #509bdc (7.06:1); AAA: background → #d6d6d6 (7.07:1)

## Brands using this color

- **Alaska Airlines** — secondary #01426a (Δ 1.141) — https://brandsweets.com/colors/brands/alaskaair-com

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- modern: https://brandsweets.com/fonts/mood/modern
- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/15436a-9cadc4-df4e51-1f212d-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: "#15436a" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.