# #303e5f

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

## Values

- Hex: `#303e5f`
- RGB: rgb(48, 62, 95)
- HSL: hsl(222, 33%, 28%)
- OKLCH: oklch(0.367 0.06 266)
- Relative luminance: 0.049
- Nearest named color: Black Turmeric (#2c4364, Δ 1.599) — https://brandsweets.com/colors/black-turmeric
- Moods: cool, muted, dark, luxury, bold
- Page: https://brandsweets.com/colors/303e5f

## Tints & shades

- Tints (toward white): #3c4d77, #485d8e, #546ca6, #6a80b4, #8294c0, #99a8cc, #b1bdd8, #c9d1e4, #e0e5f0, #f8f9fc
- Shades (toward black): #2c3a58, #27334e, #242e47, #1f283d, #1b2336, #181f2f, #131825, #0f141f, #0a0d14, #07090e

## Harmonies

- Complementary: #5f5130
- Analogous: #30565f, #39305f
- Triadic: #5f303e, #3e5f30
- Split-complementary: #5f3930, #565f30
- Tetradic: #5f3056, #5f5130, #305f39

## Colors that go with #303e5f

Named partners (harmony on the OKLCH wheel, co-occurrence in curated palettes and brand systems, and the neutrals that carry it), best first:

- **Sea Green** #2e8b57 [harmony, pool: triadic] — Sea Green completes a triad with #303e5f — three hues spaced evenly round the wheel, the classic way to get energy into a palette without a clash. Seen in: Jack Daniel's (https://brandsweets.com/colors/brands/jackdaniels-com), Asana (https://brandsweets.com/colors/brands/asana-com), Mushroom (https://brandsweets.com/palettes/neutral#mushroom), Subaru (https://brandsweets.com/colors/brands/subaru-com). — https://brandsweets.com/colors/seagreen
- **Steel Blue** #4682b4 [harmony, pool: analogous] — Steel Blue is #303e5f's neighbour on the wheel, so the two read as one family — use it for hover states, gradients and secondary surfaces. Seen in: Auth0 (https://brandsweets.com/colors/brands/auth0-com), Plaid (https://brandsweets.com/colors/brands/plaid-com), Glacier (https://brandsweets.com/palettes/cool#glacier), Fintech Trust (https://brandsweets.com/palettes/cool#fintech-trust). — https://brandsweets.com/colors/steelblue
- **Dark Olive Green** #556b2f [harmony, pool: complementary] — Dark Olive Green sits directly opposite #303e5f on the wheel — the strongest contrast one hue can give another, so use it small: a button, a link colour, one highlight. Seen in: Olive Grove (https://brandsweets.com/palettes/muted#olive-grove), 7-Eleven (https://brandsweets.com/colors/brands/7-eleven-com), Oatmeal (https://brandsweets.com/palettes/neutral#oatmeal). — https://brandsweets.com/colors/darkolivegreen
- **Blue** #0000ff [pool] — 11 real palettes, including Alaska Airlines's brand system and Jeep's brand system put Blue beside #303e5f, as the accent. Seen in: Alaska Airlines (https://brandsweets.com/colors/brands/alaskaair-com), Jeep (https://brandsweets.com/colors/brands/jeep-com), Minecraft (https://brandsweets.com/colors/brands/minecraft-net), Dunkin' (https://brandsweets.com/colors/brands/dunkindonuts-com). — https://brandsweets.com/colors/blue
- **Blush Pink** #e8b4b8 [pool] — 4 real palettes, including Garden Wedding and Nursery put Blush Pink beside #303e5f, as the supporting colour. Seen in: Garden Wedding (https://brandsweets.com/palettes/light#garden-wedding), Nursery (https://brandsweets.com/palettes/light#nursery), Rain Garden (https://brandsweets.com/palettes/cool#rain-garden), Blush (https://brandsweets.com/palettes/light#blush). — https://brandsweets.com/colors/blush-pink
- **Burlywood** #deb887 [pool] — Burlywood is paired with #303e5f in 4 real palettes, including Coastal and Polaroid, as the accent. Seen in: Coastal (https://brandsweets.com/palettes/cool#coastal), Polaroid (https://brandsweets.com/palettes/light#polaroid), Velvet (https://brandsweets.com/palettes/luxury#velvet), Chalkboard (https://brandsweets.com/palettes/dark#chalkboard). — https://brandsweets.com/colors/burlywood
- **Cadet Blue** #5f9ea0 [pool] — Designers have shipped Cadet Blue with #303e5f: 5 real palettes, including Open House and Coastal, as the supporting colour. Seen in: Open House (https://brandsweets.com/palettes/clean#open-house), Coastal (https://brandsweets.com/palettes/cool#coastal), Clean Beauty (https://brandsweets.com/palettes/minimal#clean-beauty), Paper & Pine (https://brandsweets.com/palettes/minimal#paper-and-pine). — https://brandsweets.com/colors/cadetblue
- **White Smoke** #f5f5f5 [role] — White Smoke is the surface for #303e5f: 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): 10.61:1 — AA pass, AA-large pass, AAA pass
- On black (#000000): 1.98:1 — AA fail, AA-large fail, AAA fail. Fix: AA: text → #5c74ad (4.56:1); AA: background → #ababab (4.62:1); AAA: text → #8597c1 (7.19:1); AAA: background → #d4d4d4 (7.16:1)

## Brands using this color

- **Harley-Davidson** — accent #383b5e (Δ 1.394) — https://brandsweets.com/colors/brands/harley-davidson-com
- **Tumblr** — primary #304058 (Δ 1.534) — https://brandsweets.com/colors/brands/tumblr-com

## Fonts for this mood

- 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/303e5f-9ca3c4-df6e4e-211f2d-e9eff1?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: "#303e5f" })`), `check_contrast` (with fixes), `generate_palette` (explore around locks), `suggest_palette` (mood/industry → curated-first), `list_palettes`.