# #173145

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

## Values

- Hex: `#173145`
- RGB: rgb(23, 49, 69)
- HSL: hsl(206, 50%, 18%)
- OKLCH: oklch(0.303 0.049 243.6)
- Relative luminance: 0.0281
- Nearest named color: Blue Whale (#1e3442, Δ 1.589) — https://brandsweets.com/colors/blue-whale
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/173145

## Tints & shades

- Tints (toward white): #214763, #2b5c82, #3672a1, #4088bf, #5e9bc9, #7daed4, #9cc1de, #bad4e8, #d9e7f2, #f7fafc
- Shades (toward black): #162e41, #132939, #122636, #0f212e, #0e1e2a, #0d1b26, #0a161f, #09131b, #060e13, #050b0f

## Harmonies

- Complementary: #452b17
- Analogous: #174542, #171a45
- Triadic: #451731, #314517
- Split-complementary: #45171a, #454217
- Tetradic: #421745, #452b17, #1a4517

## Colors that go with #173145

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

- **Dark Olive Green** #556b2f [harmony, pool: triadic] — Dark Olive Green completes a triad with #173145 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal), Undergrowth (https://brandsweets.com/palettes/dark#undergrowth). — https://brandsweets.com/colors/darkolivegreen
- **Royal Blue** #4169e1 [harmony, pool: analogous] — Royal Blue is #173145's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Docker (https://brandsweets.com/colors/brands/docker-com), Rotten Tomatoes (https://brandsweets.com/colors/brands/rottentomatoes-com), Loom (https://brandsweets.com/colors/brands/loom-com), Headspace (https://brandsweets.com/colors/brands/headspace-com). — https://brandsweets.com/colors/royalblue
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #173145 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Harvest (https://brandsweets.com/palettes/warm#harvest). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: analogous] — Teal is #173145's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: N26 (https://brandsweets.com/colors/brands/n26-com), Alpine (https://brandsweets.com/palettes/cool#alpine), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Stanley (https://brandsweets.com/colors/brands/stanley1913-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #173145 in 9 real palettes, including Beach Hut and McDonald's's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 18 real palettes, including Monzo's brand system and Minecraft's brand system put Blue beside #173145, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Headspace (https://brandsweets.com/colors/brands/headspace-com), Readymag (https://brandsweets.com/colors/brands/readymag-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Rain Garden and Blush put Blush Pink beside #173145, as the accent. Seen in: Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Blush (https://brandsweets.com/palettes/light#blush), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding). — https://brandsweets.com/colors/blush-pink
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #173145: 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): 13.45:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.56:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #397aac (4.55:1); AA: background → #969696 (4.55:1); AAA: text → #5e9bc9 (7.01:1); AAA: background → #bdbdbd (7.16:1)

## Brands using this color

- **UEFA** — secondary #1a313c (Δ 1.676) — https://brandsweets.com/colors/brands/uefa-com
- **Amazon** — secondary #232f3e (Δ 1.821) — https://brandsweets.com/colors/brands/amazon-com

## Fonts for this mood

- luxury: https://brandsweets.com/fonts/mood/luxury
- bold: https://brandsweets.com/fonts/mood/bold
- 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/173145-9caec4-df4e56-1f212d-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: "#173145" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.