Color

#3859bc

#3859bc
hex#3859bc
rgbrgb(56, 89, 188)
hslhsl(225, 54%, 48%)
oklchoklch(0.496 0.161 266.6)
Closest name: Denim (#1560bd)Relative luminance 0.1162

Colors that go with #3859bc

Charcoal, Sea Green 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 →

#bc9b38

#389bbc · #5938bc

#bc3859 · #59bc38

Split-complementary

Open in tool →

#bc5938 · #9bbc38

#bc389b · #bc9b38 · #38bc59

Contrast

#3859bc as textRatioAAAA largeAAAFix
Aaon white
6.32:1passpassfail
  • AAA: use #3452ad as the text (7.1:1)
Aaon black
3.32:1failpassfail
  • AA: use #5271cb as the text (4.58:1)
  • AAA: use #7d94d8 as the text (7.1:1)
  • AA: or shift the background to #dbdbdb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #3859bc as the background.

Brands using this color

Fonts for this mood

#3859bc reads as cool, modern. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #3859bc
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 #3859bc and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/3859bc-9ca1c4-df754e-221f2d-e9eff1?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