Color

#3a475f

#3a475f
hex#3a475f
rgbrgb(58, 71, 95)
hslhsl(219, 24%, 30%)
oklchoklch(0.397 0.044 262.4)
Closest name: Bonne Nuit (#3a4866)Relative luminance 0.0623

Colors that go with #3a475f

Teal, Sienna and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#5f523a

#3a595f · #403a5f

#5f3a47 · #475f3a

Split-complementary

Open in tool →

#5f403a · #595f3a

#5f3a59 · #5f523a · #3a5f40

Contrast

#3a475f as textRatioAAAA largeAAAFix
Aaon white
9.35:1passpasspassPasses AAA — no fix needed.
Aaon black
2.25:1failfailfail
  • AA: use #61769e as the text (4.59:1)
  • AAA: use #8797b5 as the text (7.12:1)
  • AA: or shift the background to #b5b5b5 (4.56:1)
  • AAA: or shift the background to #e0e0e0 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3a475f as the background.

Brands using this color

Fonts for this mood

#3a475f reads as cool, muted, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3a475f
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #3a475f and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3a475f-9ca5c4-df664e-211f2d-e9f0f1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md