# #237b78

A color — neutral. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#237b78`
- RGB: rgb(35, 123, 120)
- HSL: hsl(178, 56%, 31%)
- OKLCH: oklch(0.532 0.081 191.7)
- Relative luminance: 0.1588
- Nearest named color: Emperor Jade (#007b75, Δ 1.301) — https://brandsweets.com/colors/emperor-jade
- Moods: neutral
- Page: https://brandsweets.com/colors/237b78

## Tints & shades

- Tints (toward white): #2b9794, #31afab, #3cc8c3, #58d0cc, #74d8d4, #8cdedc, #a7e6e4, #c3eeed, #dbf5f4, #f7fdfd
- Shades (toward black): #1f6f6d, #1d6765, #1a5b59, #16504e, #144846, #113c3a, #0d302f, #0a2423, #081c1b, #041010

## Harmonies

- Complementary: #7b2326
- Analogous: #237b4c, #23527b
- Triadic: #78237b, #7b7823
- Split-complementary: #7b2352, #7b4c23
- Tetradic: #4c237b, #7b2326, #527b23

## Colors that go with #237b78

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 #237b78: softer than #000 and cool enough to feel like part of the same palette. Seen in: Gusto (https://brandsweets.com/colors/brands/gusto-com), N26 (https://brandsweets.com/colors/brands/n26-com), Stanley (https://brandsweets.com/colors/brands/stanley1913-com), Asana (https://brandsweets.com/colors/brands/asana-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: complementary] — Crimson sits directly opposite #237b78 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Gemstone (https://brandsweets.com/palettes/vivid#gemstone), Redfin (https://brandsweets.com/colors/brands/redfin-com), Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix). — https://brandsweets.com/colors/crimson
- **Amber** #ffbf00 [pool] — Amber is paired with #237b78 in 4 real palettes, including Beach Hut and Lemon Squeezy's brand system, as the supporting colour. Seen in: Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Lemon Squeezy (https://brandsweets.com/colors/brands/lemonsqueezy-com), Wired (https://brandsweets.com/colors/brands/wired-com), McDonald's (https://brandsweets.com/colors/brands/mcdonalds-com). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 4 real palettes, including Warp's brand system and Kia's brand system put Blue beside #237b78, as the supporting colour. Seen in: Warp (https://brandsweets.com/colors/brands/warp-dev), Kia (https://brandsweets.com/colors/brands/kia-com), Rolex (https://brandsweets.com/colors/brands/rolex-com), Activision (https://brandsweets.com/colors/brands/activision-com). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #237b78: 5 real palettes, including Intel's brand system and Ink & Paper, as the lead colour. Seen in: Intel (https://brandsweets.com/colors/brands/intel-com), Ink & Paper (https://brandsweets.com/palettes/minimal#ink-and-paper), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust), Glacier (https://brandsweets.com/palettes/cool#glacier). — https://brandsweets.com/colors/cobalt
- **Copper** #b87333 [pool] — Designers have shipped Copper with #237b78: 5 real palettes, including Riverbed and Wellness, as the accent. Seen in: Riverbed (https://brandsweets.com/palettes/muted#riverbed), Wellness (https://brandsweets.com/palettes/warm#wellness), Clay & Linen (https://brandsweets.com/palettes/warm#clay-and-linen), Desert Road (https://brandsweets.com/palettes/warm#desert-road). — https://brandsweets.com/colors/copper
- **Denim** #1560bd [pool] — Designers have shipped Denim with #237b78: 12 real palettes, including Intel's brand system and Jack Daniel's's brand system, as the supporting colour. Seen in: Intel (https://brandsweets.com/colors/brands/intel-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Netflix (https://brandsweets.com/colors/brands/netflix), Paramount+ (https://brandsweets.com/colors/brands/paramountplus-com). — https://brandsweets.com/colors/denim
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #237b78: 5 real palettes, including Wendy's's brand system and Newsprint, as the supporting colour. Seen in: Wendy's (https://brandsweets.com/colors/brands/wendys-com), Newsprint (https://brandsweets.com/palettes/editorial#newsprint), Fireside (https://brandsweets.com/palettes/dark#fireside), AT&T (https://brandsweets.com/colors/brands/att-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 5.03:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #1b5f5d (7.39:1)
- On black (#000000): 4.18:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #258380 (4.64:1); AA: background → #f5f5f5 (4.61:1); AAA: text → #2fa7a3 (7.18:1)

## Brands using this color

- **Gusto** — secondary #1e7676 (Δ 1.601) — https://brandsweets.com/colors/brands/gusto-com

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/237b78-a2bcbe-d45999-1f282d-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: "#237b78" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.