# #123b3b

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

## Values

- Hex: `#123b3b`
- RGB: rgb(18, 59, 59)
- HSL: hsl(180, 53%, 15%)
- OKLCH: oklch(0.324 0.045 195.2)
- Relative luminance: 0.0357
- Nearest named color: Royal Neptune (#1c3b42, Δ 1.688) — https://brandsweets.com/colors/royal-neptune
- Moods: cool, dark, luxury, bold, modern
- Page: https://brandsweets.com/colors/123b3b

## Tints & shades

- Tints (toward white): #1c5a5a, #267d7d, #309c9c, #3abbbb, #57cbcb, #76d5d5, #96dfdf, #b5e8e8, #d8f3f3, #f7fdfd
- Shades (toward black): #113737, #103333, #0e2f2f, #0d2b2b, #0c2727, #0a1f1f, #081b1b, #071717, #061414, #051010

## Harmonies

- Complementary: #3b1212
- Analogous: #123b26, #12263b
- Triadic: #3b123b, #3b3b12
- Split-complementary: #3b1226, #3b2612
- Tetradic: #26123b, #3b1212, #263b12

## Colors that go with #123b3b

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: complementary] — Crimson sits directly opposite #123b3b on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Codecademy (https://brandsweets.com/colors/brands/codecademy-com), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com), Frost & Ember (https://brandsweets.com/palettes/bold#frost-and-ember), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/crimson
- **Sea Green** #2e8b57 [harmony, pool: analogous] — Sea Green is #123b3b's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Mushroom (https://brandsweets.com/palettes/neutral#mushroom), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Subaru (https://brandsweets.com/colors/brands/subaru-com). — https://brandsweets.com/colors/seagreen
- **Sienna** #a0522d [harmony, pool: split] — Sienna is a split-complement of #123b3b: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), Harvest (https://brandsweets.com/palettes/warm#harvest), BrandSweets (https://brandsweets.com/colors/brands/brandsweets), Woodsmoke (https://brandsweets.com/palettes/dark#woodsmoke). — https://brandsweets.com/colors/sienna
- **Teal** #008080 [harmony, pool: analogous] — Teal is #123b3b'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), Stanley (https://brandsweets.com/colors/brands/stanley1913-com), Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Gusto (https://brandsweets.com/colors/brands/gusto-com). — https://brandsweets.com/colors/teal
- **Amber** #ffbf00 [pool] — Amber is paired with #123b3b in 8 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), Google (https://brandsweets.com/colors/brands/google-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 14 real palettes, including Instacart's brand system and Jeep's brand system put Blue beside #123b3b, as the accent. Seen in: Instacart (https://brandsweets.com/colors/brands/instacart-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Headspace (https://brandsweets.com/colors/brands/headspace-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 5 real palettes, including Rain Garden and Garden Wedding put Blush Pink beside #123b3b, as the accent. Seen in: Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Blush (https://brandsweets.com/palettes/light#blush), Nursery (https://brandsweets.com/palettes/light#nursery). — https://brandsweets.com/colors/blush-pink
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #123b3b: 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): 12.25:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.71:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #288181 (4.55:1); AA: background → #9e9e9e (4.57:1); AAA: text → #34a8a8 (7.31:1); AAA: background → #c4c4c4 (7.02:1)

## Brands using this color

- **Logitech** — accent #0d3a38 (Δ 0.742) — https://brandsweets.com/colors/brands/logitech-com
- **N26** — accent #003b39 (Δ 1.205) — https://brandsweets.com/colors/brands/n26-com
- **Chobani** — secondary #1a3c34 (Δ 1.508) — https://brandsweets.com/colors/brands/chobani-com
- **Chobani** — accent #1b3a32 (Δ 1.589) — https://brandsweets.com/colors/brands/chobani-com

## Curated palettes containing it

- **Mint Chip** (pastel, light, clean) — #98d8c8, #c8e6c9, #f7c8a0, #fbfffd, #1f3a33 — Mint and celadon with a peach accent — fresh without being clinical; the deep green text keeps it grounded. — tool: https://brandsweets.com/palettes/new/98d8c8-c8e6c9-f7c8a0-fbfffd-1f3a33 — collection: https://brandsweets.com/palettes/pastel

## 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/123b3b-a2bbbe-d45994-1f272d-e9f1ed?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: "#123b3b" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.