# #171d72 A color — cool, vivid, dark, technical, modern, luxury, bold. Deterministic analysis from BrandSweets (no inference). ## Values - Hex: `#171d72` - RGB: rgb(23, 29, 114) - HSL: hsl(236, 66%, 27%) - OKLCH: oklch(0.296 0.142 270.9) - Relative luminance: 0.0228 - Nearest named color: midnightblue (#191970, Δ 0.902) — https://brandsweets.com/colors/midnightblue - Moods: cool, vivid, dark, technical, modern, luxury, bold - Page: https://brandsweets.com/colors/171d72 ## Tints & shades - Tints (toward white): #1d2590, #242dae, #2a34cb, #414bd8, #626bdf, #8087e5, #9ea3eb, #bbbff1, #d9dbf7, #f7f7fd - Shades (toward black): #161b6a, #13185d, #111655, #10144c, #0e1144, #0b0e37, #0a0c2f, #080a26, #050719, #030411 ## Harmonies - Complementary: #726c17 - Analogous: #174b72, #3f1772 - Triadic: #72171d, #1d7217 - Split-complementary: #723f17, #4b7217 - Tetradic: #72174b, #726c17, #17723f ## Colors that go with #171d72 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 #171d72: softer than #000 and cool enough to feel like part of the same palette. Seen in: Boeing (https://brandsweets.com/colors/brands/boeing-com), CeraVe (https://brandsweets.com/colors/brands/cerave-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), dbt Labs (https://brandsweets.com/colors/brands/getdbt-com). — https://brandsweets.com/colors/charcoal - **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #171d72's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Deep Water (https://brandsweets.com/palettes/dark#deep-water), Glacier (https://brandsweets.com/palettes/cool#glacier), Plaid (https://brandsweets.com/colors/brands/plaid-com), Hershey's (https://brandsweets.com/colors/brands/hersheys-com). — https://brandsweets.com/colors/steelblue - **Blue** #0000ff [pool] — 5 real palettes, including Monzo's brand system and Alaska Airlines's brand system put Blue beside #171d72, as the accent. Seen in: Monzo (https://brandsweets.com/colors/brands/monzo-com), Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Sketch (https://brandsweets.com/colors/brands/sketch-com), Penpot (https://brandsweets.com/colors/brands/penpot-app). — https://brandsweets.com/colors/blue - **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #171d72: 6 real palettes, including Purina Pro Plan's brand system and Blue Mono, as the accent. Seen in: Purina Pro Plan (https://brandsweets.com/colors/brands/chewy-com), Blue Mono (https://brandsweets.com/palettes/cool#blue-mono), Glacier (https://brandsweets.com/palettes/cool#glacier), Tide (https://brandsweets.com/colors/brands/tide-com). — https://brandsweets.com/colors/cobalt - **Crimson** #dc143c [pool] — Crimson is paired with #171d72 in 5 real palettes, including Nintendo's brand system and Casper Sleep's brand system, as the supporting colour. Seen in: Nintendo (https://brandsweets.com/colors/brands/nintendo-com), Casper Sleep (https://brandsweets.com/colors/brands/casper-com), Pepsi (https://brandsweets.com/colors/brands/pepsi-com), Marvel (https://brandsweets.com/colors/brands/marvel-com). — https://brandsweets.com/colors/crimson - **Denim** #1560bd [pool] — Designers have shipped Denim with #171d72: 12 real palettes, including Bank of America's brand system and Panasonic's brand system, as the accent. Seen in: Bank of America (https://brandsweets.com/colors/brands/bankofamerica-com), Panasonic (https://brandsweets.com/colors/brands/panasonic-com), Skechers (https://brandsweets.com/colors/brands/skechers-com), Hasbro (https://brandsweets.com/colors/brands/hasbro-com). — https://brandsweets.com/colors/denim - **Light Sea Green** #20b2aa [pool] — Light Sea Green shows up next to #171d72 in 4 real palettes, including Confluent's brand system and Ford's brand system, as the accent. Seen in: Confluent (https://brandsweets.com/colors/brands/confluent-io), Ford (https://brandsweets.com/colors/brands/ford-com), Taco Bell (https://brandsweets.com/colors/brands/tacobell-com), Lido (https://brandsweets.com/palettes/vivid#lido). — https://brandsweets.com/colors/lightseagreen - **Powder Blue** #b0e0e6 [pool] — Designers have shipped Powder Blue with #171d72: 4 real palettes, including Glacier and Frost & Ember, as the supporting colour. Seen in: Glacier (https://brandsweets.com/palettes/cool#glacier), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), First Snow (https://brandsweets.com/palettes/cool#first-snow), Opera (https://brandsweets.com/colors/brands/opera-com). — https://brandsweets.com/colors/powderblue ## Contrast (WCAG 2.x, as text) - On white (#ffffff): 14.43:1 — AA pass, AA-large pass, AAA pass - On black (#000000): 1.46:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #626bdf (4.69:1); AA: background → #919191 (4.58:1); AAA: text → #888fe7 (7.13:1); AAA: background → #b5b5b5 (7.04:1) ## Brands using this color - **Visa** — primary #1a1e73 (Δ 0.541) — https://brandsweets.com/colors/brands/visa-com - **Visa** — secondary #1a1f72 (Δ 0.656) — https://brandsweets.com/colors/brands/visa-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/171d72-9e9cc4-df8f4e-241f2d-e9eef1?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: "#171d72" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.