# #337fd7

A color — cool, vivid, technical, modern. Deterministic analysis from BrandSweets (no inference).

## Values

- Hex: `#337fd7`
- RGB: rgb(51, 127, 215)
- HSL: hsl(212, 67%, 52%)
- OKLCH: oklch(0.594 0.154 254.4)
- Relative luminance: 0.2079
- Nearest named color: Blue Jay (#5588dd, Δ 4.172) — https://brandsweets.com/colors/blue-jay
- Moods: cool, vivid, technical, modern
- Page: https://brandsweets.com/colors/337fd7

## Tints & shades

- Tints (toward white): #488cdb, #5997de, #6ea4e2, #7fafe6, #95bcea, #aacaee, #bbd4f2, #d0e2f6, #e1ecf9, #f6fafd
- Shades (toward black): #2872c8, #2366b3, #205da2, #1c508d, #184477, #133862, #0f2c4d, #0c223c, #081626, #030a11

## Harmonies

- Complementary: #d78a33
- Analogous: #33d1d7, #3833d7
- Triadic: #d7337f, #7fd733
- Split-complementary: #d73833, #d1d733
- Tetradic: #d733d1, #d78a33, #33d738

## Colors that go with #337fd7

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 #337fd7: softer than #000 and cool enough to feel like part of the same palette. Seen in: Disney (https://brandsweets.com/colors/brands/disney-com), Auth0 (https://brandsweets.com/colors/brands/auth0-com), Beach Hut (https://brandsweets.com/palettes/light#beach-hut), Plaid (https://brandsweets.com/colors/brands/plaid-com). — https://brandsweets.com/colors/charcoal
- **Crimson** #dc143c [harmony, pool: triadic] — Crimson completes a triad with #337fd7 — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: NASCAR (https://brandsweets.com/colors/brands/nascar-com), Pizza Hut (https://brandsweets.com/colors/brands/pizzahut-com), State Farm (https://brandsweets.com/colors/brands/statefarm-com), Foot Locker (https://brandsweets.com/colors/brands/footlocker-com). — https://brandsweets.com/colors/crimson
- **Copper** #b87333 [harmony, pool: complementary] — Copper sits directly opposite #337fd7 on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Notion (https://brandsweets.com/colors/brands/notion). — https://brandsweets.com/colors/copper
- **Amber** #ffbf00 [pool] — Amber is paired with #337fd7 in 12 real palettes, including Walmart's brand system and Google's brand system, as the accent. Seen in: Walmart (https://brandsweets.com/colors/brands/walmart-com), Google (https://brandsweets.com/colors/brands/google-com), Wired (https://brandsweets.com/colors/brands/wired-com), Wikipedia (https://brandsweets.com/colors/brands/wikipedia-org). — https://brandsweets.com/colors/amber
- **Blue** #0000ff [pool] — 14 real palettes, including Readymag's brand system and Qualcomm's brand system put Blue beside #337fd7, as the supporting colour. Seen in: Readymag (https://brandsweets.com/colors/brands/readymag-com), Qualcomm (https://brandsweets.com/colors/brands/qualcomm-com), BBC (https://brandsweets.com/colors/brands/bbc-com), Cargo (https://brandsweets.com/colors/brands/cargo-site). — https://brandsweets.com/colors/blue
- **Cobalt Blue** #0047ab [pool] — Designers have shipped Cobalt Blue with #337fd7: 11 real palettes, including Hershey's's brand system and General Mills's brand system, as the supporting colour. Seen in: Hershey's (https://brandsweets.com/colors/brands/hersheys-com), General Mills (https://brandsweets.com/colors/brands/generalmills-com), Intel (https://brandsweets.com/colors/brands/intel-com), Carrefour (https://brandsweets.com/colors/brands/carrefour-com). — https://brandsweets.com/colors/cobalt
- **Deep Sky Blue** #00bfff [pool] — Designers have shipped Deep Sky Blue with #337fd7: 9 real palettes, including Astro's brand system and Patreon's brand system, as the supporting colour. Seen in: Astro (https://brandsweets.com/colors/brands/astro-build), Patreon (https://brandsweets.com/colors/brands/patreon-com), Telegram (https://brandsweets.com/colors/brands/telegram-org), Deep Water (https://brandsweets.com/palettes/dark#deep-water). — https://brandsweets.com/colors/deepskyblue
- **Firebrick** #b22222 [pool] — Designers have shipped Firebrick with #337fd7: 6 real palettes, including Honda's brand system and AT&T's brand system, as the supporting colour. Seen in: Honda (https://brandsweets.com/colors/brands/honda-com), AT&T (https://brandsweets.com/colors/brands/att-com), Campbell's (https://brandsweets.com/colors/brands/campbells-com), Wendy's (https://brandsweets.com/colors/brands/wendys-com). — https://brandsweets.com/colors/firebrick

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

- On white (#ffffff): 4.07:1 — AA fail, AA-large pass, AAA fail. Fix: AA: text → #2977d1 (4.51:1); AA: background → #141414 (4.52:1); AAA: text → #1e5899 (7.21:1)
- On black (#000000): 5.16:1 — AA pass, AA-large pass, AAA fail. Fix: AAA: text → #5d9adf (7.15:1)

## Brands using this color

- **Notion** — accent #2383e2 (Δ 1.873) — https://brandsweets.com/colors/brands/notion

## Fonts for this mood

- technical: https://brandsweets.com/fonts/mood/technical
- 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/337fd7-9caac4-df564e-1f202d-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: "#337fd7" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.