# #172f45

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

## Values

- Hex: `#172f45`
- RGB: rgb(23, 47, 69)
- HSL: hsl(209, 50%, 18%)
- OKLCH: oklch(0.297 0.05 247.9)
- Relative luminance: 0.0264
- Nearest named color: Midnight Ocean (#0f2d4d, Δ 1.921) — https://brandsweets.com/colors/midnight-ocean
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/172f45

## Tints & shades

- Tints (toward white): #214363, #2b5882, #366da1, #4082bf, #5e96c9, #7daad4, #9cbede, #bad2e8, #d9e6f2, #f7fafc
- Shades (toward black): #162c41, #132739, #122436, #0f1f2e, #0e1d2a, #0d1a26, #0a151f, #09121b, #060d13, #050a0f

## Harmonies

- Complementary: #452d17
- Analogous: #174544, #171845
- Triadic: #45172f, #2f4517
- Split-complementary: #451718, #454417
- Tetradic: #441745, #452d17, #184517

## Colors that go with #172f45

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 #172f45 — 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
- **Sienna** #a0522d [harmony, pool: complementary] — Sienna sits directly opposite #172f45 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
- **Slate Blue** #6a5acd [harmony, pool: analogous] — Slate Blue is #172f45's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Superhuman (https://brandsweets.com/colors/brands/superhuman-com), Marvel (https://brandsweets.com/colors/brands/marvel-com), GitLab (https://brandsweets.com/colors/brands/gitlab), Indigo SaaS (https://brandsweets.com/palettes/modern#indigo-saas). — https://brandsweets.com/colors/slateblue
- **Teal** #008080 [harmony, pool: analogous] — Teal is #172f45'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 #172f45 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), Southwest Airlines (https://brandsweets.com/colors/brands/southwest-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 19 real palettes, including Monzo's brand system and Headspace's brand system put Blue beside #172f45, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Headspace (https://brandsweets.com/colors/brands/headspace-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Sketch (https://brandsweets.com/colors/brands/sketch-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 6 real palettes, including Rain Garden and Graphite Mono put Blush Pink beside #172f45, as the accent. Seen in: Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Graphite Mono (https://brandsweets.com/palettes/neutral#graphite-mono), Blush (https://brandsweets.com/palettes/light#blush), 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 #172f45: 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): 13.73:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.53:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #3c7ab4 (4.64:1); AA: background → #949494 (4.53:1); AAA: text → #669bcc (7.13:1); AAA: background → #bababa (7.08:1)

## Brands using this color

- **Amazon** — secondary #232f3e (Δ 1.935) — https://brandsweets.com/colors/brands/amazon-com

## Curated palettes containing it

- **Open House** (clean, cool, modern) — #2f6690, #8fa3b8, #e3a72f, #ffffff, #1b2a41 — Steel blue for trust, warm gold for the sold moment — an approachable brokerage that still feels established. — tool: https://brandsweets.com/palettes/new/2f6690-8fa3b8-e3a72f-ffffff-1b2a41 — collection: https://brandsweets.com/palettes/clean
- **Coastal** (cool, light, clean) — #2a9d8f, #8ecae6, #e9c46a, #f7fafc, #1a2b3c — Sea-teal, sky and sand — bright without shouting; works for travel, wellness, and anything near water. — tool: https://brandsweets.com/palettes/new/2a9d8f-8ecae6-e9c46a-f7fafc-1a2b3c — collection: https://brandsweets.com/palettes/cool

## 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/172f45-9cacc4-df4e4e-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: "#172f45" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.