Color

#4189aa

#4189aa
hex#4189aa
rgbrgb(65, 137, 170)
hslhsl(199, 45%, 46%)
oklchoklch(0.598 0.088 230.5)
Closest name: Blue Moon (#3992a8)Relative luminance 0.2192

Colors that go with #4189aa

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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#aa6241

#41aa97 · #4154aa

#aa4189 · #89aa41

Split-complementary

Open in tool →

#aa4154 · #aa9741

#9741aa · #aa6241 · #54aa41

Contrast

#4189aa as textRatioAAAA largeAAAFix
Aaon white
3.9:1failpassfail
  • AA: use #3b7d9b as the text (4.57:1)
  • AAA: use #2b5c73 as the text (7.29:1)
  • AA: or shift the background to #171717 (4.6:1)
Aaon black
5.38:1passpassfail
  • AAA: use #599fc0 as the text (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #4189aa as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#4189aa reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #4189aa
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 #4189aa and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/4189aa-9cb3c4-df4e66-1f232d-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