# #307e57

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

## Values

- Hex: `#307e57`
- RGB: rgb(48, 126, 87)
- HSL: hsl(150, 45%, 34%)
- OKLCH: oklch(0.534 0.099 158.4)
- Relative luminance: 0.1624
- Nearest named color: Amazon (#387b54, Δ 0.953) — https://brandsweets.com/colors/amazon
- Moods: neutral
- Page: https://brandsweets.com/colors/307e57

## Tints & shades

- Tints (toward white): #389466, #42ae78, #51bd87, #6bc799, #81cfa8, #97d8b8, #b1e2c9, #c8ead9, #e1f4eb, #f8fcfa
- Shades (toward black): #2b734f, #276847, #235c40, #1f5138, #1b4630, #163b29, #123021, #0e251a, #0a1a12, #060f0a

## Harmonies

- Complementary: #7e3057
- Analogous: #307e30, #307e7e
- Triadic: #57307e, #7e5730
- Split-complementary: #7e307e, #7e3030
- Tetradic: #30307e, #7e3057, #7e7e30

## Colors that go with #307e57

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 #307e57: softer than #000 and cool enough to feel like part of the same palette. Seen in: Asana (https://brandsweets.com/colors/brands/asana-com), Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Stanley (https://brandsweets.com/colors/brands/stanley1913-com), N26 (https://brandsweets.com/colors/brands/n26-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: split] — Crimson is a split-complement of #307e57: nearly opposite, so it still pops against it, without the vibrating edge of a true complement. Seen in: Five Guys (https://brandsweets.com/colors/brands/fiveguys-com), Netflix (https://brandsweets.com/colors/brands/netflix), Coinbase (https://brandsweets.com/colors/brands/coinbase), Gemstone (https://brandsweets.com/palettes/vivid#gemstone). — https://brandsweets.com/colors/crimson
- **Medium Violet Red** #c71585 [harmony, pool: complementary] — Medium Violet Red sits directly opposite #307e57 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Bun (https://brandsweets.com/colors/brands/bun-sh). — https://brandsweets.com/colors/mediumvioletred
- **Blue** #0000ff [pool] — 4 real palettes, including Kia's brand system and Warp's brand system put Blue beside #307e57, as the accent. Seen in: Kia (https://brandsweets.com/colors/brands/kia-com), Warp (https://brandsweets.com/colors/brands/warp-dev), Instacart (https://brandsweets.com/colors/brands/instacart-com), Rolex (https://brandsweets.com/colors/brands/rolex-com). — https://brandsweets.com/colors/blue
- **Copper** #b87333 [pool] — Designers have shipped Copper with #307e57: 5 real palettes, including Wellness and Riverbed, as the supporting colour. Seen in: Wellness (https://brandsweets.com/palettes/warm#wellness), Riverbed (https://brandsweets.com/palettes/muted#riverbed), 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 #307e57: 7 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
- **Goldenrod** #daa520 [pool] — Goldenrod shows up next to #307e57 in 4 real palettes, including Mid-Century and Fireside, as the accent. Seen in: Mid-Century (https://brandsweets.com/palettes/warm#mid-century), Fireside (https://brandsweets.com/palettes/dark#fireside), Sapphire & Gold (https://brandsweets.com/palettes/luxury#sapphire-and-gold), Harvest (https://brandsweets.com/palettes/warm#harvest). — https://brandsweets.com/colors/goldenrod
- **Royal Blue** #4169e1 [pool] — Royal Blue is paired with #307e57 in 7 real palettes, including Subaru's brand system and Coinbase's brand system, as the supporting colour. Seen in: Subaru (https://brandsweets.com/colors/brands/subaru-com), Coinbase (https://brandsweets.com/colors/brands/coinbase), Xbox (https://brandsweets.com/colors/brands/xbox-com), GitHub (https://brandsweets.com/colors/brands/github). — https://brandsweets.com/colors/royalblue

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

- On white (#ffffff): 4.94:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #266445 (7.02:1)
- On black (#000000): 4.25:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #32855c (4.65:1); AA: background → #f5f5f5 (4.53:1); AAA: text → #41aa75 (7.23:1)

## Brands using this color

- **BrandSweets** — success #2f7d51 (Δ 0.847) — https://brandsweets.com/colors/brands/brandsweets
- **Shopify** — primary #008060 (Δ 1.925) — https://brandsweets.com/colors/brands/shopify

## Palette tool

Open this color locked as the lead with four explored companions: https://brandsweets.com/palettes/new/307e57-a2beb3-d459d2-1f2d2c-e9f1ea?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: "#307e57" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.