Color

#4180aa

#4180aa
hex#4180aa
rgbrgb(65, 128, 170)
hslhsl(204, 45%, 46%)
oklchoklch(0.576 0.092 240.2)
Closest name: steelblue (#4682b4)Relative luminance 0.1946

Colors that go with #4180aa

Charcoal, Copper and Amber 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.

Real palettes that use #4180aa

Tints & shades

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

Harmonies

Complementary

Open in tool →

#aa6b41

#41aaa0 · #414baa

#aa4180 · #80aa41

Split-complementary

Open in tool →

#aa414b · #aaa041

#a041aa · #aa6b41 · #4baa41

Contrast

#4180aa as textRatioAAAA largeAAAFix
Aaon white
4.29:1failpassfail
  • AA: use #3e7aa3 as the text (4.65:1)
  • AAA: use #2e5c7a as the text (7.17:1)
  • AA: or shift the background to #0d0d0d (4.53:1)
Aaon black
4.89:1passpassfail
  • AAA: use #649ec4 as the text (7.23:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4180aa as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#4180aa reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4180aa
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 #4180aa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4180aa-9cafc4-df4e5a-1f222d-e9f1f0?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